I posted this here several months ago. Might be of some interest since it was with a 139gr. SST Hornady bullet.
I worked up this load several years ago for a Wy. Antelope/Mule Deer hunt. The gun is a Rem. Mtn. rifle with a very slender barrel. PLEASE BE ADVISED, THIS LOAD IS WARM AND OVER MAX worked fine in my gun but yours may be different. Primers were fine, just a slight extractor mark on a couple of cases all mic'd within specs..
45.2 gr IMR4064, Hornady 139gr SST, CCI 250 primers. Avg. speed 2978, ES 26.6 SD 10.0
Shot was taken at 286 yards. I was aiming just behind the shoulder but the cross wind was stronger then I thought. Bullet entered dead center low on the right shoulder, took out the top 2/3 of the heart and exited off side shoulder. The goat never took a step.
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