I am just curious as to why there is a variation in weight at 400g. Why a five grain variation to 405g ? (I'm talking about the 405g bullets the Big Guy's are making for the 458 caliber rifles) Can't they make a bullet any weight they want like you and me, Or is there some reason I don't know about that makes a need to jump to (or stop at) 405g.
Lead boolits can vary several grains due to alloy, but the Jacketed bullet depends on Lead and Copper. So just balance the two for whatever weight you want. I could almost understand on a smaller bullet like the 68g 223 (5.56) round, it may be a little more difficult to balance out the weight. But on something this large, seems like it should be a piece of cake.