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Posted by D Sherman [72.47.9.228] on Tuesday, April 05, 2011 at 12:04:08 :
In Reply to: OT, rifle question posted by Tim Holloway [69.54.28.229] on Tuesday, April 05, 2011 at 10:38:35 :
I was looking at that, too, since 7.62x25 is the last of the cheap surplus ammo (thanks to the UN). It's loaded mighty hot for pistol ammo -- gives quite a bang and a kick in my Tokarev pistol. It's supposedly made for some sub-machine gun, so a rifle could probably make better use of it. They have various chamber inserts these days, even ones to shoot .22LR in a revolver. In that case the "barrel" IS the chamber insert and the bullet should never even touch the pistol barrel, which means the accuracy must be terrible. It probably goes bang and a piece of lead comes out the end, but that's about it. They even have one that shoots air gun pellets down an AR-15, using 209 shotgun primers as the power source.
I'm 99.99% sure that the stock magazine will not feed sub-sized rounds into any of these chamber inserts. A clever guy can make anything he wants, and I suspect it would be possible to start with one of those chamber inserts and modify a receiver and mag to feed the small rounds, but it would be a project. Remember also the extractor will grab the rim of that insert and pull it out when you work the bolt.
I can see trying to adapt 7.62x25 to a gun for which cheap surplus ammo is no longer available, like a .30-06 or .308, but there is still some surplus 7.65x54R on the market, albeit not a cheap as it was a few years ago, so why not just shoot the ammo the gun was designed for? I suppose the other alternative would be to buy a whole bunch of chamber inserts, load them up with Tokarev ammo, and load them in the chamber like they were 7.62x54R, maybe even on stripper clips. But at $15 per insert, there goes the cost savings. Those inserts seem like a pretty high-profit item. Anybody with a screw machine could turn them out by the bucket full. They don't even have to be heat treated since the rifle's chamber absorbs the stress.
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