Honestly I'm not sure you really could. The AR action isn't the weak link with one of these, it's the case itself.
Oh yeah? What have you found about it? Stretch a lot? Weak primer pockets? ?????
In my experience, it'll tend to loosen primer pockets before exceeding pressure capability of the AR platform, and with a properly gassed rifle (so it doesn't unlock early) you can run right up to the limits of the brass. Of course you can break a bolt too, but with modern bolts that's more an issue of an out of square barrel extension in the upper. To be fair, my experience with this is in the Grendel cartridge, but I'm using the same 7.62x39 brass just fireformed to the Grendel case. I don't know if stretching would be any more of an issue in the 7.62.
