After trying to get Nosler 60 gr Partitions and 64 gr BSB to group accurately unsuccessfully I tried some 63 gr Sierra SMPs. In my Tikka T3 Lite .22-250 with a 1 - 14 twist they grouped in to a 1/2" for three shots. After reading the success hunters were having using them for deer and antelope I decided to use them for antelope but I would limit the shot distance to 200 yards. I located a herd of antelope with a mature buck in stalkable terrain. Then I crawled into range and waited for about 45 minutes until the buck gave me a shot. At the shot he reared up and went about 15 yards and folded up. I ranged the shot at 140 yards and the little bullet performed superbly. I was surprised at the damage done with a complete pass thru. Great little bullet IMO.