I have shot nothing but IMR-4831 in my 300 Win mag for close to 40 yrs. I shoot Hornady 165 gr Interlock at close to 3200 FPS. The Hornady 165 gr hold up real good from Whitetail to Mule Deer and Elk and Moose. I shot my N.D. Elk at roughly 250 yds. I drove that bullet thru both shoulder and...