Home Forums Hunting & Shooting Hunting Rifles 7.62x39 Ackley Improved, Anyone?

Wondered if anyone has gone down this road. just picked up a nice CZ & like the look of the 123grn hornady SST. I felt an AI would give it a bit more boost. I believe PTG did offer the reamer

Johno

I'm waiting for someone to plug their .22lrAI.

The 7.62X39 is cunningly crafted for reliability, that strong body taper that is antithetical to P.O. Ackley's stuff. You would lose its most remarkable attribute.

This would be remarkably similar to the 7.62 PPC I built in 1984. GD

I don't think the reliability would be an issue in the CZ bolt action & box magazine. It should feed fine, just not sure the work & expense would be justified in the return I would get

Johno

I could only imagine that putting the AI on that cartridge would COMPLETELY change its shape! Seems that maybe it would make for some radical fire forming. So much body taper, maybe.. Maybe not. Interesting though.

Fireforming is in and of itself radical and the desired change is to change its shape, but this is not necessarily a bad thing and as the 7.62x39 is commonally fireformed in the Grendel chamber and in my 6.5 Grendel Max with complete sucess, so the fireforming of the 7.62 to AI is not any concern at all. If there is a reamer off the shelf then someone has done it and the reported gains is what Johno is looking for.

Laugh

I like CB shorts AI. I also have an oddball rifle that is .40 caliber but uses the .38-55 case. Muzzle loading breech cartridge gun. Reverse AI. None of that is as odd as the OP's quest in my mind, such as it is. 7.62x39 AI might, just might, catch up to the .30-30, but I doubt it.

God knows how many 7.62x39s been shot at me, none of them have connected yet.

Better be glad they weren't AI'd!

Forgetting the AI process for a moment, would the 7.62x39 be able to be safely loaded to higher pressures in a bolt action like the CZ than in the SKS and other automatics?

If so, how high can it be safely handloaded?

The 7.62PPC drove 168's to about 2280 fps and 150's to 2450. Pressures were up there but brass life was still good. GD

Keep in mind I don't want to move up to heavier bullets. Though one does come to mind that might work very well on the improved case, the new hornady 30cal, 150grn SST for the 300 savage. Its a shorter bullet than the standard 150grn SST.

I had a case drawing sent to me, unfortunately I don't know how to post it, it shows the standard round, 30 PPC & 7.62x39 improved. The latter was done done by simply running a 6mm PPC reamer deeper. I really like the idea of this case. Oh yes 308" bullets often shoot very well from the CZ .311" bore. Have a friend who collects seed from trees using the 110grn plinkers in his ruger. Maybe have a look at the velocity gains in the grndel when chambered in bolt action, you will be surprised

Johno