It's ok to piss on my boots as long as I'm not wearing my best pair. I did shoot about 50 rounds before the mod. and it would not feed with an AK mag but worked fine with the Saiga. After the mod ,it feeds fine with either mag and any different ammo. As I said earlier, I haven't tried to run any round nose through it. I'm a geezer and not very tech savy when it comes to computers but I'll try to post a pic or two if I can. As I said ,I'm not a gunsmith but consider myself a "tinker". I've built and fly my own experimental airplane, motor raced (5 time 5 state regional champion), building my ow