Howdy fellas , I have been working up loads for my recent build , a .338 rum and 92.o gr. of Retumbo is pushing a 300 gr. Elite hunter at 2812 @ 50 f with a 20ft extreme spread and just above 1/2 " moa out to 200 so far( going out to the 1k range this weekend). Being from the south it is impossable to figure out what a powders velosity will be at say 15F . Shooting down to say 35f takes some luck, meaning it must happen on the weekend and it is usually in poor lighting conditions, with spring well on the way I may not have those rare opportunities between now and elk season. Any help on estimates with this powder is appreciated .