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Posted: 4/21/2010 12:10:33 PM EDT
Its a Ko-Tonics 6.8 barreled AR. On the 3rd shot of a new gun it want KaBOOM. Shooting 110gr SSA ammo.
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– FOR SALE 6.8 conversion kit for your AR. Only shot 3 times! Buy now and I will throw in some free ammo! 
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Posted: 4/21/2010 12:14:58 PM EDT
[#1]
Ouch, but how new can the gun be? Kotonics has been out of business for a while now (unfortunately)...
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Posted: 4/21/2010 12:26:57 PM EDT
[#2]
Quoted:
Ouch, but how new can the gun be? Kotonics has been out of business for a while now (unfortunately)... It was new (owned for 2 years) and never been shot. It was shot on Tuesday for the first time (and the last) |
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Posted: 4/21/2010 12:39:04 PM EDT
[#3]
Yikes. That's a bad one. Good reason to use one of the SPC II chamber reamers that's going around...
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Posted: 4/21/2010 12:46:00 PM EDT
[#4]
Were you shooting SSA's combat loads?
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Posted: 4/21/2010 12:46:59 PM EDT
[#5]
Wow, glad you're okay.
Looks like the gas key screws were not staked. Any idea what caused the Kaboom? |
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Posted: 4/21/2010 12:57:20 PM EDT
[#6]
Quoted:
Were you shooting SSA's combat loads? I dont think they are. |
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Posted: 4/21/2010 1:00:50 PM EDT
[#7]
Quoted:
Yikes. That's a bad one. Good reason to use one of the SPC II chamber reamers that's going around... Ko-Tonics was one of the first to use the SPCII chamber. They did have problems with too much chrome in the bore, that was what put them out of business. Do you have the brass from the first two shots? |
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Posted: 4/21/2010 1:01:18 PM EDT
[#8]
Quoted:
Quoted:
Ouch, but how new can the gun be? Kotonics has been out of business for a while now (unfortunately)... It was new (owned for 2 years) and never been shot. It was shot on Tuesday for the first time (and the last) That's a damn bummer, man. Time for a Bison Armory barrel! $200, and it can be yours! I would suggest the 18" recon profile myself (that's what I have). Damn fine shooter! |
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Posted: 4/21/2010 1:02:20 PM EDT
[#9]
Quoted:
Wow, glad you're okay. Looks like the gas key screws were not staked. Any idea what caused the Kaboom? They were not staked in any way. It looks as if the head space was off. Not sure as I dont have 6.8 guages. After cleaning the barrel inside and out, the bore is 100% mint with no marks of any type. |
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Posted: 4/21/2010 1:03:33 PM EDT
[#10]
Quoted:
Quoted:
Yikes. That's a bad one. Good reason to use one of the SPC II chamber reamers that's going around... Ko-Tonics was one of the first to use the SPCII chamber. They did have problems with too much chrome in the bore, that was what put them out of business. Do you have the brass from the first two shots? Yes I do. I will post pics of them tonight. |
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Posted: 4/21/2010 1:11:01 PM EDT
[#11]
damn bro. Now thats a KABOOM.
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Posted: 4/21/2010 1:11:09 PM EDT
[#12]
this is why i'll buy my parts from reputable companies
OP that sucks. contact SSA and see what they say. |
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Posted: 4/21/2010 1:16:35 PM EDT
[#13]
Wow. Looks like it took out the HoloSight too. Dang!
On the lighter side, the pic of the wonky screws in gas key looks like this:  |
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Posted: 4/21/2010 1:17:25 PM EDT
[#14]
Definitely bad ammo... I doubt SSA will show you any love though.
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Posted: 4/21/2010 1:20:49 PM EDT
[#15]
Wanna sell cheap
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Posted: 4/21/2010 2:23:31 PM EDT
[#16]
Quoted:
Definitely bad ammo... I doubt SSA will show you any love though. This does look like it could be an ammo issue, more specifically a case head failure. Did you keep the first 2 pieces of brass? Do they look normal? Notice any high primers or irregularities with the unfired rounds? |
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Posted: 4/21/2010 3:23:50 PM EDT
[#17]
It's obvious its an ammo issue.
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Posted: 4/21/2010 4:59:28 PM EDT
[#18]
LOOKS like it is one of the LR primer SSA rounds, is it factory or did you reload it?
SSA started out with the LR brass and has since only produced SR loaded ammo (they do offer the LR brass currently tho but not loaded) there was an issue with some of the early production ammo being over pressure. I think they recalled it(might be wrong, was a while ago) you may have gotten a box of the old stuff. |
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Posted: 4/21/2010 5:03:38 PM EDT
[#19]
curios, what happened to the mag when it blew?
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Posted: 4/21/2010 5:18:13 PM EDT
[#20]
Quoted:
curios, what happened to the mag when it blew? There was no mag in the gun when it was fired. |
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Posted: 4/21/2010 5:36:39 PM EDT
[#21]
Wow!
What brand bolt and BCG? How old is that SSA ammo. Some of their early stuff was "Combat Loaded" hotter than their current "Tactical Loads". Was the barrel from the Ko-Tonics era or after Tim changed to the Cardinal Armory name? I've got two Cardinal Armory barrels from the last batch and they both are great shooters with Tac Loads. |
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Posted: 4/21/2010 5:43:19 PM EDT
[#22]
Jeez, glad you werent hurt.
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Posted: 4/21/2010 5:43:31 PM EDT
[#23]
Quoted:
Quoted:
curios, what happened to the mag when it blew? There was no mag in the gun when it was fired. Good thing for that, gave the blast a direction to go away from you. Are you all in one piece? |
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Posted: 4/21/2010 6:01:53 PM EDT
[#24]
Quoted:
Wow! What brand bolt and BCG? How old is that SSA ammo. Some of their early stuff was "Combat Loaded" hotter than their current "Tactical Loads". Was the barrel from the Ko-Tonics era or after Tim changed to the Cardinal Armory name? I've got two Cardinal Armory barrels from the last batch and they both are great shooters with Tac Loads. The ammo is some of the first 6.8 that SSA made. It came from Cardinal Armory as an upper. The barrel is marked KT 68 6.8 SPC 1:11. I dont think its the barrel. I still think its the ammo or the head spacing. |
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Posted: 4/21/2010 6:08:38 PM EDT
[#25]
The top 2 are new unfired. The bottom 2: one on the left is round number 2 and the round on the right is the KaBOOM!
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Posted: 4/21/2010 6:16:17 PM EDT
[#26]
Wow, huge overpressure. Blew out the primer on the 2nd shot, what about the 1st round?
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Posted: 4/21/2010 7:04:22 PM EDT
[#27]
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Posted: 4/21/2010 8:07:51 PM EDT
[#28]
Glad you are OK!
Bad things happen when an AR lets go..... |
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Posted: 4/21/2010 8:19:00 PM EDT
[#29]
 Damn! Glad you're alright |
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Posted: 4/21/2010 8:25:55 PM EDT
[#30]
Most impressive KB I've ever seen!
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Posted: 4/21/2010 8:26:49 PM EDT
[#31]
Quoted: Holy overpressure signs, Batman! The top 2 are new unfired. The bottom 2: one on the left is round number 2 and the round on the right is the KaBOOM! http://i43.tinypic.com/2py9pn8.jpg I always check the first few ejected cases on a new gun / barrel, for this reason.... If you had seen the blown primer and stopped like you should have, you wouldn't have had the kaboom... |
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Posted: 4/22/2010 12:14:41 AM EDT
[#32]
I was going to ask why you didn't check the brass before taking the second shot on your new rifle. Then I realized that yesterday I fired 5 rnds before even looking at my brass in my new OSR. I guess I will have to change that practice on new rifles/loads.
Glad you weren't hurt. Out of curiosity did you have your leading hand on the magwell? ––mort |
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Posted: 4/22/2010 12:46:19 AM EDT
[#33]
looks like a ammo issue loaded to hot.If it was me I would contact silver state and send them a link to this tread that shows all your pic's.The ammo factory's do make mistakes too
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Posted: 4/22/2010 2:20:50 AM EDT
[#34]
That sucks!
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Posted: 4/22/2010 2:31:24 AM EDT
[#35]
that a hot load.when primer blows out.contact ammo manufacturer. dont look like a gun problem.
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Posted: 4/22/2010 2:33:46 AM EDT
[#36]
Hmmm, that SSA looks familiar. My buddy had problems with some 90 TNT SPEER out of his LMT. No KABOOM but plenty of blown primers. My guess is the first primer (2nd shot) was stuck in the chamber when the 3rd round blew....
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Posted: 4/22/2010 4:05:03 AM EDT
[#37]
I wasnt the one shooting it my friend was. The bottom of the bolt carrier went through the mag well and through the top of the shooting bench. The pic of the bolt carrier that has the bottom part is what went through the bench. I dont know what would have happened if there would have been a mag in it.
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Posted: 4/22/2010 5:02:21 AM EDT
[#38]
Could you post a pic of an unfired round? If they have blunt tips they are the old XTream round that SSA used to use. In addition to being loaded hot, the bullet itself had problems that could result in high pressures. My Kotonics barrels (I have 3) all eat this round like candy. In fact I bought up all I could find because it was cheap. I shot some of it last weekend.
My guess is that an Xtream round fired through one of the few problem Kotonics barrels that are out there could cause a K-Boom like this?? If you do happen to have these rounds SSA will take them back and give you a .65 cents per round credit towards the purchase of new ammo. (or at least they were doing this at one time) Please post this info over at 68forums.com asap |
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Posted: 4/22/2010 5:21:21 AM EDT
[#39]
Quoted:
Could you post a pic of an unfired round? If they have blunt tips they are the old XTream round that SSA used to use. In addition to being loaded hot, the bullet itself had problems that could result in high pressures. My Kotonics barrels (I have 3) all eat this round like candy. In fact I bought up all I could find because it was cheap. I shot some of it last weekend. My guess is that an Xtream round fired through one of the few problem Kotonics barrels that are out there could cause a K-Boom like this?? If you do happen to have these rounds SSA will take them back and give you a .65 cents per round credit towards the purchase of new ammo. (or at least they were doing this at one time) Please post this info over at 68forums.com asap Here is what they look like. The .65 cents per round sounds good.... but I no longer have a gun to shoot them out of. 
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Posted: 4/22/2010 5:30:35 AM EDT
[#40]
Teamafx,
Glad you are ok. Thanks for the info. To help answer some questions. KoTonics had some barrel issues which put them out of business. Thats first. Second, thats some of the older, SSA ammo. While I cannot say which was the cause, I sent you an IM with the email of someone at SSA who I suggest you link to this thread or email photos of that KB too. Not sure what if anything SSA can do, but I think the email will help somehow. |
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Posted: 4/22/2010 5:37:13 AM EDT
[#41]
Bad barrel combined with a bad round?
Good reason to look at your braSs while shooting. |
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Posted: 4/22/2010 5:42:30 AM EDT
[#42]
Holy shit.
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Posted: 4/22/2010 5:52:42 AM EDT
[#43]
was it the blue box ammo from CTD? I bought 30 boxes of it when they had it for 11.95 but it was way too hot to shoot in my rec 7 and I sent it all back.
Glad no one was hurt |
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Posted: 4/22/2010 6:11:09 AM EDT
[#44]
Holy SMOKES!!! I'm glad you guys weren't hurt!
Note to self: #1 - Keep hand OFF the mag well when shooting the 1st shot of my new work-up handloads... #2 - Shoot ONE shot and inspect the brass BEFORE shooting 2nd shot! I will learn from what happened to you guys. WOW! -ZA |
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Posted: 4/22/2010 6:42:21 AM EDT
[#45]
Glad no one was hurt.
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Posted: 4/22/2010 6:51:40 AM EDT
[#46]
Good all are ok.
I would have the chamber checked for detentions & if its to spec's ,I would get after the ammo manufacturer ,if any thing ,to pay for parts replacement .As said with the upper manufacturer out of business and if the chamber is not up to spec's ,your out on your own. |
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Posted: 4/22/2010 7:16:29 AM EDT
[#47]
Note to self - safety glasses
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Posted: 4/22/2010 7:53:26 AM EDT
[#48]
Is it just me, or is the bottom round not even straight (looks warped)? |
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Posted: 4/22/2010 8:01:06 AM EDT
[#49]
Quoted: http://i44.tinypic.com/oapukp.jpg]http://i44.tinypic.com/oapukp.jpg]http://i44.tinypic.com/oapukp.jpg Is it just me, or is the bottom round not even straight (looks warped)? Optical illusion. (from the shadows) put a straight edge on each side of the case on your screen  |
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Posted: 4/22/2010 8:17:28 AM EDT
[#50]
Glad no one was hurt, could've been several things and maybe several things combined that caused it, 1. the older spec chamber which is not friendly to hot loads, 2. hot loaded thin wall brass which SSA is known for to cram more powder in. 3. the barrel over chromed, creating a smaller barrel size which in created the extreme over pressure
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