86alaskan
Well-Known Member
So, I'm loading the 131gr Blackjack in my 25-06 for some LR target and hunting. So far I've tested Retumbo and IMR8133. Both powders get me approximately the same speed at nearly the same charge level. However, according to the IMR load data center, the 8133 load comes in at 10k psi higher pressure at that charge level. The Retumbo is 59gr and 3185fps, the 8133 is 60.5gr for 3190fps. Would you run the Retumbo or the 8133 based on the potentially higher pressures? I have 10lbs of the same lot of 8133, only the remainder of 1lb of retumbo, so I'd need more of it. Both charges are at approx 105% with slight compression when dropped and settled.