Re: new custom rifle
I am using a factory rem 700 300 ultra mag with a 26" barrell. The best load i've found in the month I've had it is 99.5 grains of hogden Retumbo behind 180 grain hornady interbonds in remington cases using rimington or cci magnum primers. found a slug out of the bowling ball I shot at 100 yards last weekend. picked up some of the concrete when it mushroomed, but very impressive.
I also got 3/4 moa loads using speer 180 gr btsp on 99 gr retumbo, hot load for primer, not as bad as factory though. Bullets didn't hold up well on impact at the rum's velocity
I will be testing some heavier bullets next year because there are a lot of people on this sight that love the 200 grain nosler accubond, it's worth a try. The 190 gr hornady interlock btsp showed a lot of potential as well.
"I am a stone. I do not move. Very slowly, I put snow in my mouth and he won't see my breath. I take my time. . . I have only one bullet. I aim at his eye. Very gently, my finger presses on the trigger. I do not tremble. I have no fear"