Apparently those are REALLY GOOD! Wish I had the $$ to try them. I "roll my own" with Speer 123gr. "Hot Core" SP's. The quality of the Speer's is a little disapointing, but I've also got some Hornady SP's that arent too bad looking.
At least in my guns, anytime I fire SP's I can fire one round, then manually eject the next round and see a dent in the Soft Point where the bolt pushed the shell into the feed ramp (polished ramps dont seem to help to much).
That's why I only load ballistic tip for my AR10, and would LOVE to get about 500 of the ballistic tip Hornady bullets to load for 7.62X39.
Even some bolt guns do that.
In a pinch (it'd have to be a REALLY bad pinch for me), you
can get away with loading .308" bullets at the cost of accuracy and velocity. Not the strong points of the 7.62x39 to begin with.