I've been using a lot of the 115gr Federal RTP (RTP9115) ammo for 3-gun because my local gun shop usually has it in stock at a good price. I've gone through a couple cases with zero problems. I will use 147gr if there is a MGM spinner on the stage though. the 115gr just don't move it much and I'm not good enough to get multiple fast hits like the big guys. I use 124gr Speer Gold Dot in my carry gun.