The methods are not only different, but ten thousand times more important with cast than jacketed. You have to go to full-on benchrest loading tolerances and attention to vibration, pressure curve, just to equal the accuracy and velocity of factory loaded jacketed ammo with cast boolits.
Yes, Larry, you understood me correctly. The problem is, like Rick alluded to, it hasn't been explained in a straightforward, conversational way. Even then, the full understanding doesn't come until one actually ACHIEVES a good launch with components he manipulated and assembled himself, usually after a lot of false-starts and errors. I'm not saying I have a "full understanding", I don't, but I've gotten the high-velocity launch really close to right in six rifles now and a lot of the same principles apply. Bob described most of it when he posted about making a chamber cast and mimicking it closely with the entire loaded cartridge. Then there's alloy, pressure curve, and the little tricks that matter a lot, but that really IS a subject for another thread, and I think I have sidetracked the twist subject of this thread enough.
Gear