10/22 "Kaboom", defective case ?

[kyron4]

Was shooting my Ruger 10/22 that is over 10 years old with thousand of rounds and never a problem. Pulled the trigger and POW! debris hit my face, blew the mag out of the rifle, half rim stuck on bolt face, case in chamber. First thoughts a out of battery kaboom. Took it home and removed the case sleeve from chamber came right out . The case was was cut clean and I mean clean right at the rim, looked like a caseing with no rim, The back of the bolt had been slightly chamfered ( only half as much as what Que's or Kidd does )years ago and I thought that caused a OOB , but uesing shims and a primered case it would not pop the primer with a .020" shim between bolt and barrel face. My only conclusion was it was a defected case. Ammo was Rem Golden Bullets, and I have shot thousands with only duds being an issue. I did a search and could find no reports of 10/22 even with chamfered bolt have OOB issues. Safe to say it was a one in a million bad round ? your thoughts ? -Thank you

 

[chrome_austex]

Keep searching, 10/22s are known to be able to fire OOB. Nice 'feature' eh?

Were you firing quickly?

 

[1KPerDay]

Check the bore... squib loads have been known to rupture .22 cases

 

[briansmithwins]

I would suspect the failure rate on .22 LR is way under one in a million.

It's a cheap round for a reason.

BSW

 

[CraigC]

Shoot enough rimfire cartridges and sooner or later, you'll have a case head rupture. I shoot tens of thousands a year and had to get a receiver that was out of alignment enough to allow the bolt face to contact the cartridge rim for it to happen. So it's not exactly something that happens often but it does happen. I wouldn't worry too much about it.

While it's popular on the `net to call them garbage, I swear 'by' Remington GB's and shoot more of them than any other load. Usually at least a couple thousand a month with very little issue. Actually, out of the last several boxes I've been through, I don't even remember a single misfire.

 

[Orion8472]

My brother experienced the same case destruction with Winchester Supreme. The thought was that it could have been a double charged round. Have a gunsmith check out your rifle, chamber, headspace, and let us know what he finds out.

I would bet that it was ammo related.

 

[X-Rap]

I had a Browning 22 lever back in the early 70's that would blow parts out the ejection port when shooting Fed shells. Dad sent it in a couple times and then traded it for a 10/22. I still have it all these yrs later and havent had a problem with 10's of thousands or rounds fired.

 

[Walkalong]

A friend had a blow out in his S&W M&P-22, and I had one in my TS .22 upper. No harm, gun fine, mag fine, but very surprising.


My buddies

Mine

 

[kyron4]

Were you firing quickly?

No, one shot aimed slowly.

Check the bore... squib loads have been known to rupture .22 cases

No barrel clear.

Is .015"-.020" out of battery enough to cause this ?

Also, the gun was pretty dirty, lots of carbon on the barrel face and bolt.

 

[kyron4]

Keep searching, 10/22s are known to be able to fire OOB. Nice 'feature' eh?

I look at mine and the bottom of the bolt keeps the hammer from hitting the firing pin if it is more than .020" out of battery.

 

[chrome_austex]

No the reports I've read of out-of-battery 10/22s and MP15-22s were much farther than 0.020"... more like 1/4" to 1/2"

It sucks, but it was probably ammo related, esp since you weren't firing rapidly.

 

[Slamfire]

A gentleman in my gun club had what sounded like an out of battery fire in a 10/22. He said part of the case was mushroomed.

I am not as expert in out of battery firing in 10/22's as Garands/M1a's, so I do not know if the trigger mechanism will malfunction and follow the bolt forward. I think the firing pin is on top of the bolt so the bolt would have to be pretty far forward for the hammer to contact the firing pin and strike the rim.

Something is always totally ignored is priming compound sensitivity. This is not discussed in the gun press, and industry is not going to put out any data, but I believe that some slamfires in rimfires could be explained as overly sensitive priming compound. Rimfire cartridges have these exposed rims packed full of priming compound. Given that all you have to do is hit the rim to get the cartridge to fire, I don’t see a reason why the occasional rimfire rim might be a slight touchy sensitive and go off in the rough and tumble of a semi auto mechanism.

 

[Southernsorrow]

somtimes on cheap .22 ammo they "over lube" and or copperwash the round and it gumms up wthe action with shavings and lube so the next shot after next shot the bolt isn't fully closing yet the rounds will still fire. I quit using rem golden bullets due to they only fire 7 of 10 rounds half the time and are dirty as hell. switch to more expensive winchester in the 100rnd red packs high velocity forgot what they are called and CCi mini-mags which can be had online in bulk for good prices and never a problem since in any of my rifles or handguns. even the notoriously ammo picky Sig Mosquito loves cci and those winchester rounds

 

[hardluk1]

I watch a guy with .22lr copy of a mp5 shooting remington bulk ammo. 1 round atleast out of 10 would blow out the side as it was fired or as the bolt slamed shut. Everbody move away from the line after he would not take advise from many on the ammo he was useing. Seems to be a remington ammo thing. He finally tried some mini-mags and it run ok. May be why so many guys just don't use remington 22's..

 

[jmorris]

I have had OOBs with 10/22's. They generally look bulged out at the base much like another rim and blow out to one side. Keep them clean and don't use super tight chambers and they are very unlikely.

 

[Slamfire]

I have had OOBs with 10/22's. They generally look bulged out at the base much like another rim and blow out to one side. Keep them clean and don't use super tight chambers and they are very unlikely.

So what is causing the OOB's?. Is it the bolt face wacking the back end of a stubborn case?, or is it something mechanical, like the hammer following?