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[ARCHIVED THREAD] - Blew up my go to AR15 - 300 blkout (Page 1 of 4)
Posted: 3/20/2024 5:19:59 PM EDT
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Never thought this would happen. I keep ammo cans separate. I don't shot both calibers at the same time. Not really sure how it happened but 2 300 blackout rounds found their way into a 5.56 dedicated Ammo can with about 800 rounds in it. I was shooting with NVGs and loading out of the can in the dark. The rounds must have slipped by the feel test. AR15 SBR Factory 11.5" YHM upper (2011) maybe 4-5k rounds through it. Factory RRA SBR lower (2008) Aero Precision Pro Series BCG YHM Phantom 5.56 suppressor The Bullet made it about 6-7 inches down the barrel just short of the gas block. Blew the Okay industry bottom plate out but mag stayed locked. Bulged out the bottom just a little. Still works. The bull barrel didn't seem to bulge at all but the barrel extension cracked. Attached File Attached File Locking lugs on the bolt head are damaged so are the locking lugs in the barrel extension. Extractor looks like a banana. Bolt split. Attached File Upper receiver bulged. Broke the top off the bolt release. Bent the pin on the dust cover. Attached File Attached File I got 2 small pieces of brass the hit my foot and just broke the skin. Thought I would share my fuck up. |
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Attached File Attached File Salvagable parts entire lower minus bolt release muzzle device suppressor gas tube and block handguard charging handle $400 mistake |
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Attached File New stuff is a BCM upper BA Hanson 12.3" barrel Same Aero pro series BCG |
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Do not take this as me being an ass. $400 in parts is easily 10-15 magazines. Have your mags loaded. I always hated waiting for people to load mags at rifle classes. Why waste time? If the mags were already loaded, you'd have been fine. With that said, find someone to chop the barrel, would be a cool gun room art wall hanger. |
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Quoted: Do not take this as me being an ass. $400 in parts is easily 10-15 magazines. Have your mags loaded. I always hated waiting for people to load mags at rifle classes. Why waste time? Very true. This wasn't a class. Just me shooting on some property I have and I wasn't running full mags. But all excuses. This was 100% preventable and my fault. |
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Thanks for having the balls to post that. Most people just wouldn't. And yes, .300 BO is pretty much the No 1 source of AR Kabooms now. Your's is the second one I've heard about, in about 1 month. A friend got to watch his friend Kaboom a $2K AR with .300 BO last month. The irony in that one, is that dude didn't even own a .300 BO, and refused to believe it could have happened. Until they beat out the 200 gr bullet and pulled out the shattered bolt to get to the brass. The fundamental error everyone seems to make, is that they are completely conscious of every round they touch and insert into a magazine. No, you're not. Are you conscious of every footstep you took in the parking lot to your car? Or every piece of pop-corn you eat? No, you're not. You think you are, because you don't remember that you forgot to notice something; or you would have noticed it. It's a false self-check diagnostic. Wildly more false than most people are willing to admit. There's this perception that every single round is picked up, carefully inspected, headstamp confirmed, bullet shape confirmed, and carefully inserted. Vs grabbing rounds and stuffing them in while thinking about somenthing else. Or talking to someone else even - which is what really happens way more than people admit. My problem with .300 BO and my frustration as an engineer with it, isn't that it's unsafe itself. A .300 BO round in a 300 BO gun is totally safe. The furstration is it's an engineered system that in the wild, has the unsafe condition of being dissasterously unsafe in other guns and magazines that are often intermingled in usage and handling. There's a reason .357 magnum is longer than .38 special, and it's not to hold more gunpowder. Almost every other round is safety considered in a manner to minimize risk of mischambering and kaboom. Except .300 BO, where some failure of a safety engineer thought it was a GOOD IDEA for this round to use the same bolt and magazines, even though it was possible to mischamber in a 5.56 chamber. Whoever did that, should have their credentials pulled, if they ever even had any. And shame on SAAMI for authorising this Kaboom maker. They knew better, and caved to the pressure. And now lots of AR's are Kabooming out there. The good news is the AR design is so safe, that usually the Kaboom is restricted to wrecking the rifle and only superficial human damage.... usually. As an engineer who applyes safety, and indeed system safety consderations - I despise .300 BO. It's not even that great of a round. Grendel kicks it ass in every way; and won't kaboom your gun. If you're running a supressed 8" Piston SBR; that's about the only place that .300 BO is even worth trying; considering it's basically a high-pressure straight wall cartridge, so those shine in short barrels. Now that the arm-brace topic is a mess, why would you bother with a 16" 300 BO, where a bottle neck will beat it ballistically like a bad step-child? |
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300BLK claims another one. Glad you're OK OP. Have tore down an upper destroyed by a 300BLK before. I don't understand why those who engineered it made it to where it would chamber in a .223/5.56 chamber. This is one reason why I never got into that cartridge. .277WLV was going to be my answer to 300BLK. Only problem is/was factory ammo availability... |
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Quoted: Thanks for having the balls to post that. Most people just wouldn't. And yes, .300 BO is pretty much the No 1 source of AR Kabooms now. Your's is the second one I've heard about, in about 1 month. A friend got to watch his friend Kaboom a $2K AR with .300 BO last month. The irony in that one, is that dude didn't even own a .300 BO, and refused to believe it could have happened. Until they beat out the 200 gr bullet and pulled out the shattered bolt to get to the brass. The fundamental error everyone seems to make, is that they are completely conscious of every round they touch and insert into a magazine. No, you're not. Are you conscious of every footstep you took in the parking lot to your car? Or every piece of pop-corn you eat? No, you're not. You think you are, because you don't remember that you forgot to notice something; or you would have noticed it. It's a false self-check diagnostic. Wildly more false than most people are willing to admit. There's this perception that every single round is picked up, carefully inspected, headstamp confirmed, bullet shape confirmed, and carefully inserted. Vs grabbing rounds and stuffing them in while thinking about somenthing else. Or talking to someone else even - which is what really happens way more than people admit. My problem with .300 BO and my frustration as an engineer with it, isn't that it's unsafe itself. A .300 BO round in a 300 BO gun is totally safe. The furstration is it's an engineered system that in the wild, has the unsafe condition of being dissasterously unsafe in other guns and magazines that are often intermingled in usage and handling. There's a reason .357 magnum is longer than .38 special, and it's not to hold more gunpowder. Almost every other round is safety considered in a manner to minimize risk of mischambering and kaboom. Except .300 BO, where some failure of a safety engineer thought it was a GOOD IDEA for this round to use the same bolt and magazines, even though it was possible to mischamber in a 5.56 chamber. Whoever did that, should have their credentials pulled, if they ever even had any. And shame on SAAMI for authorising this Kaboom maker. They knew better, and caved to the pressure. And now lots of AR's are Kabooming out there. The good news is the AR design is so safe, that usually the Kaboom is restricted to wrecking the rifle and only superficial human damage.... usually. As an engineer who applyes safety, and indeed system safety consderations - I despise .300 BO. It's not even that great of a round. Grendel kicks it ass in every way; and won't kaboom your gun. If you're running a supressed 8" Piston SBR; that's about the only place that .300 BO is even worth trying; considering it's basically a high-pressure straight wall cartridge, so those shine in short barrels. Now that the arm-brace topic is a mess, why would you bother with a 16" 300 BO, where a bottle neck will beat it ballistically like a bad step-child? |
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Quoted: Thanks for having the balls to post that. Most people just wouldn't. And yes, .300 BO is pretty much the No 1 source of AR Kabooms now. Your's is the second one I've heard about, in about 1 month. A friend got to watch his friend Kaboom a $2K AR with .300 BO last month. The irony in that one, is that dude didn't even own a .300 BO, and refused to believe it could have happened. Until they beat out the 200 gr bullet and pulled out the shattered bolt to get to the brass. The fundamental error everyone seems to make, is that they are completely conscious of every round they touch and insert into a magazine. No, you're not. Are you conscious of every footstep you took in the parking lot to your car? Or every piece of pop-corn you eat? No, you're not. You think you are, because you don't remember that you forgot to notice something; or you would have noticed it. It's a false self-check diagnostic. Wildly more false than most people are willing to admit. There's this perception that every single round is picked up, carefully inspected, headstamp confirmed, bullet shape confirmed, and carefully inserted. Vs grabbing rounds and stuffing them in while thinking about somenthing else. Or talking to someone else even - which is what really happens way more than people admit. My problem with .300 BO and my frustration as an engineer with it, isn't that it's unsafe itself. A .300 BO round in a 300 BO gun is totally safe. The furstration is it's an engineered system that in the wild, has the unsafe condition of being dissasterously unsafe in other guns and magazines that are often intermingled in usage and handling. There's a reason .357 magnum is longer than .38 special, and it's not to hold more gunpowder. Almost every other round is safety considered in a manner to minimize risk of mischambering and kaboom. Except .300 BO, where some failure of a safety engineer thought it was a GOOD IDEA for this round to use the same bolt and magazines, even though it was possible to mischamber in a 5.56 chamber. Whoever did that, should have their credentials pulled, if they ever even had any. And shame on SAAMI for authorising this Kaboom maker. They knew better, and caved to the pressure. And now lots of AR's are Kabooming out there. The good news is the AR design is so safe, that usually the Kaboom is restricted to wrecking the rifle and only superficial human damage.... usually. As an engineer who applyes safety, and indeed system safety consderations - I despise .300 BO. It's not even that great of a round. Grendel kicks it ass in every way; and won't kaboom your gun. If you're running a supressed 8" Piston SBR; that's about the only place that .300 BO is even worth trying; considering it's basically a high-pressure straight wall cartridge, so those shine in short barrels. Now that the arm-brace topic is a mess, why would you bother with a 16" 300 BO, where a bottle neck will beat it ballistically like a bad step-child? Glad you're ok, OP. Anyone else now see why Magpul is releasing clear mags? Though that would not have helped OP, reloading in the dark. Lazy, SAAMI authorized .300 Eldest Son on the basis that a shooter chambering a round in a bolt action would feel the bind and stop. This has prevented .30-06 from blowing up .270 rifles for many years. What they forgot to consider was that this cartridge would be primarily used in ARs, where we add H2 buffers instead of adjustable gas blocks, and are taught to beat on the forward assist if the bolt doesn't go home. |
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Quoted: How did that happen if he doesn't own a .300? Was one mixed in with his ammunition he purchased? Or was this like a communal range day where people are sharing magazines to many different rifles? Quoted: Quoted: Thanks for having the balls to post that. Most people just wouldn't. And yes, .300 BO is pretty much the No 1 source of AR Kabooms now. Your's is the second one I've heard about, in about 1 month. A friend got to watch his friend Kaboom a $2K AR with .300 BO last month. The irony in that one, is that dude didn't even own a .300 BO, and refused to believe it could have happened. Until they beat out the 200 gr bullet and pulled out the shattered bolt to get to the brass. The fundamental error everyone seems to make, is that they are completely conscious of every round they touch and insert into a magazine. No, you're not. Are you conscious of every footstep you took in the parking lot to your car? Or every piece of pop-corn you eat? No, you're not. You think you are, because you don't remember that you forgot to notice something; or you would have noticed it. It's a false self-check diagnostic. Wildly more false than most people are willing to admit. There's this perception that every single round is picked up, carefully inspected, headstamp confirmed, bullet shape confirmed, and carefully inserted. Vs grabbing rounds and stuffing them in while thinking about somenthing else. Or talking to someone else even - which is what really happens way more than people admit. My problem with .300 BO and my frustration as an engineer with it, isn't that it's unsafe itself. A .300 BO round in a 300 BO gun is totally safe. The furstration is it's an engineered system that in the wild, has the unsafe condition of being dissasterously unsafe in other guns and magazines that are often intermingled in usage and handling. There's a reason .357 magnum is longer than .38 special, and it's not to hold more gunpowder. Almost every other round is safety considered in a manner to minimize risk of mischambering and kaboom. Except .300 BO, where some failure of a safety engineer thought it was a GOOD IDEA for this round to use the same bolt and magazines, even though it was possible to mischamber in a 5.56 chamber. Whoever did that, should have their credentials pulled, if they ever even had any. And shame on SAAMI for authorising this Kaboom maker. They knew better, and caved to the pressure. And now lots of AR's are Kabooming out there. The good news is the AR design is so safe, that usually the Kaboom is restricted to wrecking the rifle and only superficial human damage.... usually. As an engineer who applyes safety, and indeed system safety consderations - I despise .300 BO. It's not even that great of a round. Grendel kicks it ass in every way; and won't kaboom your gun. If you're running a supressed 8" Piston SBR; that's about the only place that .300 BO is even worth trying; considering it's basically a high-pressure straight wall cartridge, so those shine in short barrels. Now that the arm-brace topic is a mess, why would you bother with a 16" 300 BO, where a bottle neck will beat it ballistically like a bad step-child? Apparently he has a pile of loosies, and decided to just run them. I guess that must have included random from outside his own original supply route. I don't know the guy, but I get loosies, at times - and will run them. But when that happens, you bet your ass I inspect each one with a microscope, study the bullet, the brass, the primer, the neck - to discern if it's factory or a reload. A 55 or 62 SC, a 77, etc. I guess he did not. |
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Quoted: Glad you're ok, OP. Anyone else now see why Magpul is releasing clear mags? Though that would not have helped OP, reloading in the dark. Lazy, SAAMI authorized .300 Eldest Son on the basis that a shooter chambering a round in a bolt action would feel the bind and stop. This has prevented .30-06 from blowing up .270 rifles for many years. What they forgot to consider was that this cartridge would be primarily used in ARs, where we add H2 buffers instead of adjustable gas blocks, and are taught to beat on the forward assist if the bolt doesn't go home. Quoted: Quoted: Thanks for having the balls to post that. Most people just wouldn't. And yes, .300 BO is pretty much the No 1 source of AR Kabooms now. Your's is the second one I've heard about, in about 1 month. A friend got to watch his friend Kaboom a $2K AR with .300 BO last month. The irony in that one, is that dude didn't even own a .300 BO, and refused to believe it could have happened. Until they beat out the 200 gr bullet and pulled out the shattered bolt to get to the brass. The fundamental error everyone seems to make, is that they are completely conscious of every round they touch and insert into a magazine. No, you're not. Are you conscious of every footstep you took in the parking lot to your car? Or every piece of pop-corn you eat? No, you're not. You think you are, because you don't remember that you forgot to notice something; or you would have noticed it. It's a false self-check diagnostic. Wildly more false than most people are willing to admit. There's this perception that every single round is picked up, carefully inspected, headstamp confirmed, bullet shape confirmed, and carefully inserted. Vs grabbing rounds and stuffing them in while thinking about somenthing else. Or talking to someone else even - which is what really happens way more than people admit. My problem with .300 BO and my frustration as an engineer with it, isn't that it's unsafe itself. A .300 BO round in a 300 BO gun is totally safe. The furstration is it's an engineered system that in the wild, has the unsafe condition of being dissasterously unsafe in other guns and magazines that are often intermingled in usage and handling. There's a reason .357 magnum is longer than .38 special, and it's not to hold more gunpowder. Almost every other round is safety considered in a manner to minimize risk of mischambering and kaboom. Except .300 BO, where some failure of a safety engineer thought it was a GOOD IDEA for this round to use the same bolt and magazines, even though it was possible to mischamber in a 5.56 chamber. Whoever did that, should have their credentials pulled, if they ever even had any. And shame on SAAMI for authorising this Kaboom maker. They knew better, and caved to the pressure. And now lots of AR's are Kabooming out there. The good news is the AR design is so safe, that usually the Kaboom is restricted to wrecking the rifle and only superficial human damage.... usually. As an engineer who applyes safety, and indeed system safety consderations - I despise .300 BO. It's not even that great of a round. Grendel kicks it ass in every way; and won't kaboom your gun. If you're running a supressed 8" Piston SBR; that's about the only place that .300 BO is even worth trying; considering it's basically a high-pressure straight wall cartridge, so those shine in short barrels. Now that the arm-brace topic is a mess, why would you bother with a 16" 300 BO, where a bottle neck will beat it ballistically like a bad step-child? Glad you're ok, OP. Anyone else now see why Magpul is releasing clear mags? Though that would not have helped OP, reloading in the dark. Lazy, SAAMI authorized .300 Eldest Son on the basis that a shooter chambering a round in a bolt action would feel the bind and stop. This has prevented .30-06 from blowing up .270 rifles for many years. What they forgot to consider was that this cartridge would be primarily used in ARs, where we add H2 buffers instead of adjustable gas blocks, and are taught to beat on the forward assist if the bolt doesn't go home. You can't chamber a 30-06 into a .270 no matter how hard you try. The neck dimensions won't fit. Slamming it harder won't change that. |
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Quoted: Apparently he has a pile of loosies, and decided to just run them. I guess that must have included random from outside his own original supply route. I don't know the guy, but I get loosies, at times - and will run them. But when that happens, you bet your ass I inspect each one with a microscope, study the bullet, the brass, the primer, the neck - to discern if it's factory or a reload. A 55 or 62 SC, a 77, etc. I guess he did not. Quoted: Quoted: Quoted: Thanks for having the balls to post that. Most people just wouldn't. And yes, .300 BO is pretty much the No 1 source of AR Kabooms now. Your's is the second one I've heard about, in about 1 month. A friend got to watch his friend Kaboom a $2K AR with .300 BO last month. The irony in that one, is that dude didn't even own a .300 BO, and refused to believe it could have happened. Until they beat out the 200 gr bullet and pulled out the shattered bolt to get to the brass. The fundamental error everyone seems to make, is that they are completely conscious of every round they touch and insert into a magazine. No, you're not. Are you conscious of every footstep you took in the parking lot to your car? Or every piece of pop-corn you eat? No, you're not. You think you are, because you don't remember that you forgot to notice something; or you would have noticed it. It's a false self-check diagnostic. Wildly more false than most people are willing to admit. There's this perception that every single round is picked up, carefully inspected, headstamp confirmed, bullet shape confirmed, and carefully inserted. Vs grabbing rounds and stuffing them in while thinking about somenthing else. Or talking to someone else even - which is what really happens way more than people admit. My problem with .300 BO and my frustration as an engineer with it, isn't that it's unsafe itself. A .300 BO round in a 300 BO gun is totally safe. The furstration is it's an engineered system that in the wild, has the unsafe condition of being dissasterously unsafe in other guns and magazines that are often intermingled in usage and handling. There's a reason .357 magnum is longer than .38 special, and it's not to hold more gunpowder. Almost every other round is safety considered in a manner to minimize risk of mischambering and kaboom. Except .300 BO, where some failure of a safety engineer thought it was a GOOD IDEA for this round to use the same bolt and magazines, even though it was possible to mischamber in a 5.56 chamber. Whoever did that, should have their credentials pulled, if they ever even had any. And shame on SAAMI for authorising this Kaboom maker. They knew better, and caved to the pressure. And now lots of AR's are Kabooming out there. The good news is the AR design is so safe, that usually the Kaboom is restricted to wrecking the rifle and only superficial human damage.... usually. As an engineer who applyes safety, and indeed system safety consderations - I despise .300 BO. It's not even that great of a round. Grendel kicks it ass in every way; and won't kaboom your gun. If you're running a supressed 8" Piston SBR; that's about the only place that .300 BO is even worth trying; considering it's basically a high-pressure straight wall cartridge, so those shine in short barrels. Now that the arm-brace topic is a mess, why would you bother with a 16" 300 BO, where a bottle neck will beat it ballistically like a bad step-child? Apparently he has a pile of loosies, and decided to just run them. I guess that must have included random from outside his own original supply route. I don't know the guy, but I get loosies, at times - and will run them. But when that happens, you bet your ass I inspect each one with a microscope, study the bullet, the brass, the primer, the neck - to discern if it's factory or a reload. A 55 or 62 SC, a 77, etc. I guess he did not. The whole .300 thing reminds me of this scene.  Jurassic Park - They didn't stop to see if they should |
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Quoted: 300BLK claims another one. Glad you're OK OP. Have tore down an upper destroyed by a 300BLK before. I don't understand why those who engineered it made it to where it would chamber in a .223/5.56 chamber. This is one reason why I never got into that cartridge. .277WLV was going to be my answer to 300BLK. Only problem is/was factory ammo availability... The 300 BO round does not chamber in a 5.56. The 30 cal bullet would stop short of fully entering the chamber so it does not seat properly. What occurs is the shooter fails to see/or know the bolt not fully closing and seating the round in the chamber like it would on a correctly sized round, before pulling the trigger. Thats why the ÓP's barrel bulged, the bullet was larger than the hole, and the explosion in the receiver caused the damage to the innards and bolt. |
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After building up a 300blk, I look at every round when I load mags. 300 and 5.56 When I go to the range, whichever caliber of the 2 I am firing, the other rifle and ammo can with loaded mags stays in the truck until I'm ready to fire that caliber. The 300blk upper has a laser engraved dust cover stating "300blk" A few friends say I'm too over cautious. I tell them I'm not going to risk blowing up a gun because I was lax and could have easily prevented it. Glad your okay OP. |
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Quoted: The 300 BO round does not chamber in a 5.56. The 30 cal bullet would stop short of fully entering the chamber so it does not seat properly. What occurs is the shooter fails to see/or know the bolt not fully closing and seating the round in the chamber like it would on a correctly sized round, before pulling the trigger. Thats why the ÓP's barrel bulged, the bullet was larger than the hole, and the explosion in the receiver caused the damage to the innards and bolt. Quoted: Quoted: 300BLK claims another one. Glad you're OK OP. Have tore down an upper destroyed by a 300BLK before. I don't understand why those who engineered it made it to where it would chamber in a .223/5.56 chamber. This is one reason why I never got into that cartridge. .277WLV was going to be my answer to 300BLK. Only problem is/was factory ammo availability... The 300 BO round does not chamber in a 5.56. The 30 cal bullet would stop short of fully entering the chamber so it does not seat properly. What occurs is the shooter fails to see/or know the bolt not fully closing and seating the round in the chamber like it would on a correctly sized round, before pulling the trigger. Thats why the ÓP's barrel bulged, the bullet was larger than the hole, and the explosion in the receiver caused the damage to the innards and bolt. Supers can - first chambering. |
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I only had the one rifle out that night with only 1 ammo can and 3 mags. All loaded on site as I was shooting. 5-15 rounds at a time. On a previous range trip or at the house cleaning up loose ammo I must have put 2 rounds of 300 in the can. The 300 rounds were supers. 147 remanufactured training ammo I believe. |
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Quoted: The 300 BO round does not chamber in a 5.56. The 30 cal bullet would stop short of fully entering the chamber so it does not seat properly. What occurs is the shooter fails to see/or know the bolt not fully closing and seating the round in the chamber like it would on a correctly sized round, before pulling the trigger. Thats why the ÓP's barrel bulged, the bullet was larger than the hole, and the explosion in the receiver caused the damage to the innards and bolt. Most supers, especially anything 125gr and under, will absolutely chamber in a .223/5.56. Some subs will chamber but the heavier bullets with fatter ogives won’t chamber. There is no way for a .223/5.56 round to chamber in a 300blk barrel. The shoulder prevents it from fully chambering. |
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Quoted: Most supers, especially anything 125gr and under, will absolutely chamber in a .223/5.56. Some subs will chamber but the heavier bullets with fatter ogives won’t chamber. There is no way for a .223/5.56 round to chamber in a 300blk barrel. The shoulder prevents it from fully chambering. Quoted: Quoted: The 300 BO round does not chamber in a 5.56. The 30 cal bullet would stop short of fully entering the chamber so it does not seat properly. What occurs is the shooter fails to see/or know the bolt not fully closing and seating the round in the chamber like it would on a correctly sized round, before pulling the trigger. Thats why the ÓP's barrel bulged, the bullet was larger than the hole, and the explosion in the receiver caused the damage to the innards and bolt. Most supers, especially anything 125gr and under, will absolutely chamber in a .223/5.56. Some subs will chamber but the heavier bullets with fatter ogives won’t chamber. There is no way for a .223/5.56 round to chamber in a 300blk barrel. The shoulder prevents it from fully chambering. Attached File |
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Quoted: 300BLK claims another one. Glad you're OK OP. Have tore down an upper destroyed by a 300BLK before. I don't understand why those who engineered it made it to where it would chamber in a .223/5.56 chamber. This is one reason why I never got into that cartridge. .277WLV was going to be my answer to 300BLK. Only problem is/was factory ammo availability... I have zero idea how people just let a 300 black out round just slip by them. Projectile is objectively fatter, case shorter, and the neck is just fatter too. |
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Quoted: I have zero idea how people just let a 300 black out round just slip by them. Projectile is objectively fatter, case shorter, and the neck is just fatter too. Quoted: Quoted: 300BLK claims another one. Glad you're OK OP. Have tore down an upper destroyed by a 300BLK before. I don't understand why those who engineered it made it to where it would chamber in a .223/5.56 chamber. This is one reason why I never got into that cartridge. .277WLV was going to be my answer to 300BLK. Only problem is/was factory ammo availability... I have zero idea how people just let a 300 black out round just slip by them. Projectile is objectively fatter, case shorter, and the neck is just fatter too. Dunno if you've noticed, but the back end of .223 & .300 ES are the same size. Which end of the cartridge do you handle when loading? This is why I don't allow .300 Eldest Son in the house, despite Fatalwishes leaving a nicely set up .300 in the safe. |
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Quoted: Dunno if you've noticed, but the back end of .223 & .300 ES are the same size. Which end of the cartridge do you handle when loading? This is why I don't allow .300 Eldest Son in the house, despite Fatalwishes leaving a nicely set up .300 in the safe. |
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Quoted: The 300 BO round does not chamber in a 5.56. The 30 cal bullet would stop short of fully entering the chamber so it does not seat properly. What occurs is the shooter fails to see/or know the bolt not fully closing and seating the round in the chamber like it would on a correctly sized round, before pulling the trigger. Thats why the ÓP's barrel bulged, the bullet was larger than the hole, and the explosion in the receiver caused the damage to the innards and bolt. Supers with a short ogive will chamber in a standard 5.56 chamber. |
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Quoted: What's the story behind ".300 Eldest Son"? https://en.m.wikipedia.org/wiki/Project_Eldest_Son#:~:text=Project%20Eldest%20Son%20 |
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I have one 300blk I use with NV and a suppressor for varmint control. I keep the ammo and mags seperate. I also use only Lancer clear mags for the 300. But now I'm thinking maybe I should use the clear mags in my 556 guns to make sure no danger noodles are loaded. |
[ARCHIVED THREAD] - Blew up my go to AR15 - 300 blkout (Page 1 of 4)
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