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wncchester · November 6, 2011, 08:04 PM

"Would most of that (70's manual) info still be relevant? Or has bullet technology changed significantly since then, requiring new information sources?"

The books will still be relivant, bullet technology really hasn't changed much so far as loading goes. The major criteria of a load is the powder type and bullet weight, after that the weapon the load is fired in introduces more variables than anything else.

+++ If a powder maker 'changes' a formula, etc, they first make sure it's still the same burn rate if they plan sell it as an etablished powder. If it's really 'different' they will give it a new name; there is no reason to do otherwise. Putting out a different burn rate under an old label would incur a foolish legal exposure for absolutely no logical justification; thus, if your old containers say IMR-4350 it's still IMR-4350, etc.

November 6, 2011, 08:04 PM	#15
wncchester Senior Member Join Date: December 1, 2002 Posts: 2,832	"Would most of that (70's manual) info still be relevant? Or has bullet technology changed significantly since then, requiring new information sources?" The books will still be relivant, bullet technology really hasn't changed much so far as loading goes. The major criteria of a load is the powder type and bullet weight, after that the weapon the load is fired in introduces more variables than anything else. +++ If a powder maker 'changes' a formula, etc, they first make sure it's still the same burn rate if they plan sell it as an etablished powder. If it's really 'different' they will give it a new name; there is no reason to do otherwise. Putting out a different burn rate under an old label would incur a foolish legal exposure for absolutely no logical justification; thus, if your old containers say IMR-4350 it's still IMR-4350, etc. Last edited by wncchester; November 7, 2011 at 07:58 AM.