Vette; If you really want the Hornady Superformance loads, see if you can get interbond bullets rather than SST's. I'm no expert but my PH really liked the GMX's and Interbond was his next choice. I used 129 grain Interbonds with great success. Our PH hunts with the Hornady guys so gets lots of expieriance with their products on plains game. My old Hornady catalog lists the SST as ideal for Whitetail to Caribou and similar sized African game. Good for classic behind the shoulder and soft tissue shots. The Interbond says it is designed to expand immediately but retain more than 90% even through tough hide and bone. But with good shot placement, I'm sure either will do the job.