Thanks All.
My partner was behind me watching and he said he thought the first shot was the heart shot, pass through. The bull took off and I continued to shoot. Three more hits, one neck in front of shoulder, pass through, shoulder blade, found under off hide, quartering found in hind quarter, then he turned even more towards me. Final shot into chest slightly angled, inside shoulder, neck, found under hide opposite side. Dropped instantly then. I always continue to shoot until I know they're down for good regardless of where I think they're hit.
The rifle is a Rem 700 AWR, 300 RUM, I bedded it, free floated the barrel, installed a high speed firing pin, Jewel trigger, topped with a 2.5-10 Leupold LPS.
Shoots E Tips into .5 to .6 MOA with Retumbo and Fed 215M.
Shooting sticks are Mossback Shooting Tripod.