Year before last, I shot a medium size buck at about that distance with a Federal Fusion 150 grain .308 factory load out of my 26 inch Ruger 1B. Shoulder shot, pretty much the same results the OP described...a real bomb that just destroyed the shoulder. That was the first deer I’d shot with a factory load in about 35 or 40 years. The last deer previous to that, that I’d shot with that .308 was with a 150 grain Ballistic Tip home load going a little faster at about the same distance and the same shot placement. Same size deer. Nowhere near the rapid expansion, bomb effect.
