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I currently reload a number of rifle calibers including .223, .243, .270 Win, 7mm-08, 7x57 (Ruger #1 and 7 mm Remington Rolling Block, Model 1901), 7.62x39, .30-30, and .300 Savage. For those, I have had good results with IMR 4198, Hodgden 4895, IMR 4320, IMR 4350, and Hodgden 4831SC. I don't do any competitive shooting, but do hunt at times with every one of those guns. All except the RB give me less than 1.5 inch groups at 100 yards with the loads I have used. I am thinking that I could easily get by with no more than 2-3 of those powders, or possibly consider adding/using IMR 4166 and IMR 4451. Obviously there is a vast difference in pressures for which I load the Ruger and the Rolling Block. Since I don't currently do any handgun or shotgun loading, I think these calibers could be loaded with a slightly faster powder (among those listed) for the .223, 7.62x39, .30-30 and .300 Savage and a mid-range powder (among those listed) for the .243, .270 Win. and RB. The 7mm-08 and 7x57 Ruger could probably use either powder. What thoughts?