I used the 150 SSTs one year about 9 or 10 years ago in Wyoming for mulies and threw the rest away! They expand way too fast on deer and make a mess. I went back to their 150 grain BTSP with 59.7 grains of IMR 4350 with a CCI primer and haven't looked back! I use the same powder (50 grains) with their 117 grain BTSPs in my Ruger 25-06 for antelope and not one has moved after the shot. I go to their Interbonds in my 30-06 for elk and they shoot to the same POI as the BTSPs.