Originally Posted by cdoc42
In this case, whatever my load in the Remington case is, I should reduce by 2 grains in the Federal case.
No, that's not correct. Powder charge doesn't not correlate 1:1 with water capacity.
A few grains difference in case weight is irrelevant. Even with one brand, in one lot, from one bag, you can get variances of 3-5 grains or more.
UncleNick has said to expect 0.06-0.07gr charge weight difference per grain of water capacity difference, assuming outside dimensions are identical. That means a 2gr water difference would 0.12-0.14gr powder.... irrelevant.
Still happily answering to the call-sign Peetza.
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