because the ammo prices are soaring, I'm trying to find the best priced practice ammo that is not just crap. with wolf I always hear different things. some say it is just fine just a little dirty (but then again we should be cleaning our guns regularly anyway) and some say don't use it because it could harm your gun. it's all I've used in my AK-47, of course AK's eat anything. I've read that the new polymer coating on the wolf casings make it so it should function well in any gun. does anyone have any experience with it? any advice either way? to use or not to use? will it really harm the extractor? thanks for any advice.