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Posted: 11/19/2008 11:03:33 AM EDT
| A local guy is selling a Bushmaster .450 20" rifle for $800. It's only been shot a few times. Is this a good deal that I should jump on? You can't even get their 5.56 rifles used for that much right now. I'm looking for a short range deer gun, primarily hunting in a lot of brush. |
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The 450BM is a great deer gun.
I have one mag that allows the top round to pop the base/rim of the cartridge thru the back of mag opening(where the bolt carrier passes thru to strip a round) if the loaded mag is struck on the heel(as in seating the rounds). The other mag I have is fine. |
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The 450BM is a great deer gun. I have one mag that allows the top round to pop the base/rim of the cartridge thru the back of mag opening(where the bolt carrier passes thru to strip a round) if the loaded mag is struck on the heel(as in seating the rounds). The other mag I have is fine. Thanks. I'm going to take a closer look at it tomorrow and find out what's going on. |
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Got it! Great deal. It has had 3 rounds through it and the guy threw in the remainder of the ammo and a set of hogue grips as well as the standard issue Bushmaster stuff. Probably gonna mount a Burris 3-9x40 or Eotech 512 this weekend.
Also does anyone know where I can find Sig 556 mags in stock? I've been looking all over, but everyone is out. I've seen the 7rd 50 beowulf mags for $24 and figured these would hold at least 10 450b rounds and would be a good alternative if they feed well. Has anyone tried the beowulf mags in their .450 yet? |
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is it the 30 round sig polymer mag? Is that the one the holds ten .450 bushs? Yes, I read that on a few different posts on here so I bought 2 from rainierarms.com for $53 shipped. They should be here in the next day or two. I will let you know how they work and posts pics when I get a chance. |
| Yes! Got them yesterday and loaded the mags up with 10 rounds each. They fit perfectly in the stock Sig 556 mags. I racked the bolt back and forth and all rounds chambered/extracted/ejected flawlessly. The included mag coupler doesn't do much good for AR-15 rifles though as the ejection port cover gets in the way when you do hasty mag changes. I'll definitely be buying more of these mags since they can be used for both 5.56 and .450B without any modification. Can't wait to get some optics so I can sight this beast in! |
| Bushmaster SS mags work perfect. Stay away from Aluminun mags. 556 sig mags can work also with some minor mods and you can get 11 to 12 rounds in them. Remover the spring from the Bushmaster mag and put in a aftermarket or standard spring and the mag can hold up to 7. |
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Bushmaster SS mags work perfect. Stay away from Aluminun mags. 556 sig mags can work also with some minor mods and you can get 11 to 12 rounds in them. Remover the spring from the Bushmaster mag and put in a aftermarket or standard spring and the mag can hold up to 7. my Bushy ss mags work fine after I get the first round chambered..it's a crapshoot if when the bolt release is pressed if the first round accually chambers or not. The sigs with 10 rounds work perfect for me..no need for a mod at all..i wish they would make mags for bushmaster ( I don't know if it's the mag spring is too strong or a feed lip problem digging into the round but i don't like the bushy mag) |
| My SIG mags came in today and one works ok if there's no more than 8 rounds in it and the other doesn't work well at all. They hold 12 rounds. I can put 1 round in my PMAGS and it holds it down much lower and loads perfect. I think my Buchmaster mag and the SIG mags let them sit too high and the BCG slides against the next round. I pulled the PMAG apart and I'm going to use a pencil grinder to grind the center rib off on the inside to let the 450s stack in it. I'll post some pictures and let y'all know how it works out. |
| That sucks the sig mags didn't work for you. I only loaded ten in each mag and they fed fine, but like you said there were some light marks on all my rounds from the bcg sliding against them. as for optics i'm going to try out the barska 3-12x50 illuminated reticle selling at cabelas.com. the price is really cheap, but it has seemingly good field reviews. a guy on there purchased one and said that it worked great for his .450b and held zero after 60 rounds. eager to see how the pmag modification turns out! |
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This should help with the Pmags, very easy and quick.
http://i54.photobucket.com/albums/g96/talonxracer/IMG_0859.jpg |
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so theres no way to reliable shoot the .450 in semi? Gotta say after reading this im now considering a 458 or 50... I had not read anything about loading problems before I got mine. Unfortunately it looks like it will be a while before I get another chance to shoot and try out my PMAG and SIG. I hope to have my new mag from BM by the time I do get to go shoot. |
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Bushmaster magazines should feed reliably but they don't come any larger than 5 rounds, which the primary reason for trying different magazines.
so theres no way to reliable shoot the .450 in semi? Gotta say after reading this im now considering a 458 or 50... |
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I have several of the Bushy SS mags and a few of the aluminum postban 556 10 rndr curved mag and the 10rndr's feed better than the SS mags with 4 rounds. The SS mag will hold 5 rounds but that first round will not have a fully closed bolt and requires a slap on the FA. I think a little trimming of the mag spring will allow that first round to feed properly as there is too much spring pressure IMHO.
I am useing the rifle length MGI rate reducer and a Wolff extra power buffer spring. I would like to find a Pmag 20rndr to try. Quoted:
so theres no way to reliable shoot the .450 in semi? Gotta say after reading this im now considering a 458 or 50... And at no time does the 450 ever fail to function after that first round is loaded and the trigger pulled, so the idea that it fails to function in semi auto is entirely false. |
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I have several of the Bushy SS mags and a few of the aluminum postban 556 10 rndr curved mag and the 10rndr's feed better than the SS mags with 4 rounds. The SS mag will hold 5 rounds but that first round will not have a fully closed bolt and requires a slap on the FA. I think a little trimming of the mag spring will allow that first round to feed properly as there is too much spring pressure IMHO. I am useing the rifle length MGI rate reducer and a Wolff extra power buffer spring. I would like to find a Pmag 20rndr to try. Quoted:
so theres no way to reliable shoot the .450 in semi? Gotta say after reading this im now considering a 458 or 50... And at no time does the 450 ever fail to function after that first round is loaded and the trigger pulled, so the idea that it fails to function in semi auto is entirely false. It's also just a first round chambering problem for me too..after that all is great |
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The way the operator uses the magazine effects its operation.
When the Bushmaster SS magazines are loaded with 5 rounds, the bolt is open, the magazine is inserted, then the bolt is closed, the round feeds correctly. When the bolt is closed and a Bushmaster SS magazine loaded with 5 rounds is inserted, that insertion process meets a lot of resistance (due to magazine spring pressue). Without attemting to charge the rifle, removal of the magazine shows that the first round becomes cock-eyed in the magazine and is no longer held symmetrically by both of the magazine's feed lips. The .450 bushmaster carbines that I operate have worked well with all of the Bushmaster mags delivered with those carbines or ordered directly from Bushmaster for the .450. However, I have always been operating the carbines by inserting 5 round mags with the bolt open. |
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A prior thread touched on some of these magazine concerns and also documents some experiences of others using the .450 Bushmaster.
450 Bushmaster |
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I have the 2 pack sig mags for my .450bm. You can use the coupler . All you have to do is place one mag with ammo up and then connect the other ma with ammo facing down. the spare mag sits on the left hand side of the receiver instead of conflicting with the dust cover. Mine work flawlessly. I have put close to 300 rnds down range with mine. I also added a YHM free float rail. works perfect for carbine length.
love my .450bm |
| I always load mag with bolt open,hit bolt release,round most generally doesn't feed with 5 (I'm not new to ar's and I've put around 300 rounds through this one so far). My opinion is that it should feed both ways described anyway. Same result with replacement mags from Bushmaster. I don't think I'm alone in saying the magazine is not up to par with this great caliber/rifle. Sigs work fine w/10 rounds without any mods. |
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I always load mag with bolt open,hit bolt release,round most generally doesn't feed with 5... I would like to know if others experience the same exact problem. So first of all does the following characterize the problem? Problem: failure to chamber the first round of a fully loaded 5 round mag when the following conditions are met: lock open the bolt insert the magazine charge the firearm by releasing the bolt via the bolt catch lever Please reply if you experience the problem described above and specify the kind of mag in use. |
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I always load mag with bolt open,hit bolt release,round most generally doesn't feed with 5... I would like to know if others experience the same exact problem. So first of all does the following characterize the problem? Problem: failure to chamber the first round of a fully loaded 5 round mag when the following conditions are met: lock open the bolt insert the magazine charge the firearm by releasing the bolt via the bolt catch lever Please reply if you experience the problem described above and specify the kind of mag in use. I'm having the opposite problem. I lock the bcg back, insert mag, and release, but it will only load if there's only one round in the mag. |
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I always load mag with bolt open,hit bolt release,round most generally doesn't feed with 5... I would like to know if others experience the same exact problem. So first of all does the following characterize the problem? Problem: failure to chamber the first round of a fully loaded 5 round mag when the following conditions are met: lock open the bolt insert the magazine charge the firearm by releasing the bolt via the bolt catch lever Please reply if you experience the problem described above and specify the kind of mag in use. I'm having the opposite problem. I lock the bcg back, insert mag, and release, but it will only load if there's only one round in the mag. I would look at other possible causes as well. I have never seen that issue. And yes every SS mag I have had, has an issue with completely chambering the first round from a fully loaded mag(5rnds) from a open bolt. There is no difference between pulling the charge handle on a fully loaded mag and releasing it or by use of the bolt release. I have also NEVER had an issue with 4 or less rnds in the mag, SO.......>>>>>>> I removed a 3/16" from the spring stack(restriction section at the base) and used a piece of 400 grit wet-dry sand paper(with wd40 for wet) and a rubber sanding pad to polish the underside of the lips and she cycled all 5 thru the gun. Also never "seat" the ammo by tapping the rear of the mag against the heel of your hand, as you can bend the absurdly small amount of material retaining the top round at the rear of the mag. |
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I fully agree.. But I am not one to sit and wait for someone else to come up with a solution,,,,you must adapt and overcome any adversity placed in front of you. true,but without people talking about the issue Bushmaster will never fix the problem, the goal of all this is to have them sell a fully functional magazine not a partially functioning magazine at a high cost |
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