I've been using 165gr SST's for while in 7.5 swiss and 30-06 loads for deer. Shots have ranged from 75 - 300yrds. I have never needed a second shot but have been less than impressed at times. I've seen a lot of jacket core separation. These loads have rarely exited and those that have left the jacket in the off side hide. Wound channels are huge and can cause massive damage to meat if you happen to strike bone on entry. The worst I saw was a shot at roughly 75yrds with the 30-06 where the SST literally exploded on entry. Fragments everywhere and very little penetration. Once I use up my current loads I'll switch to something else. They do look good on paper though.