I bought into the anti-GB talk for a long time and never tried them. A couple of my .22LR guns are picky about their diet - SIG Mosquito and my Ruger 10-22 shoot fine on MiniMags, but choke occasionally on Federal bulk. Found some GBs on sale and decided what the heck, they can't be any worse than the Federals. Amazingly, since I started shooting these things I have not had a single problem in ANY of my .22LR guns - not even the Mosquito that was giving me 2-3 misfeeds per magazine on anything but MiniMags. YMMV and maybe I'm just plain lucky, but the GBs seem to work just fine for me - I'm glad I bought a dozen bricks when I could get them.