I have shot the 7.62x39, the 9mm and I have 2 boxes of the X54R to try out. It works great allthough Im allmost certain the 9mm was loaded w/ snap pops.
i shot about 800 rounds through my bushmaster this past weekend as well as some remington.. i had a failure to extract with both the wolf and the remington... today i changed my extractor spring and put one of them D rings on it.. ill go test it out again..
accuracy? i can put them in the face of a CLEET target at 100 yards.. and in the small scoring ring of the same target at the same distance.. for 19 cents a round im happy enough..
I have shot 9mm, 40 SW and 45 ACP Wolf... and probably half a case of their 5.56x45... that went through a Mini 14.
So far,,,, all of it went bang and produced a hole in some offending paper, tin can or milk jug. I have never shot any of it over a chrony... but my ears and shoulder says some of the rounds may not be loaded with consistant charges... may that's just me though. Never had a squib, nor any swollen cases or any pressure signs from any of the Wolf yet.
Cleaning up after? Like hosing the coal stack in a powerplant. Wolf produces crap akin to using charcoal for propellant. I dont mind shooting it from a Mini... but would have to be pretty hard up to run it in any AR I cared about.