like just what the title states...22cb - 50 cal... for a long time now I have played with subsonic ammo and most of it sucks. without getting to deep into it, we have tried tuns of stuff you can buy online and crap we have made at home, crazy stuff... we were running bullets backwards seeing if they kill better using electronic primers so there is no sound from the firing pin, drilling out bullets so they have a huge hollow point and putting a 17 cal bullet in the hole, just stupid stuff. we have shot hogs in the head with sub sonic 22 bullets and the bullets stop in the skull punching little holes through the lungs with 30 cal bullets and praying for a blood tail, and we have put them down like a sack of feed with 100gr 224cal bullets and huge cast 458 bullets.. but mostly just stupid bad results, horrible accuracy mostly in the smaller cal bullets... anyone play with slow bullets?