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fyi- Rem vs Fed 300wsm brass

Lotek

Private
Minuteman
Jul 7, 2019
4
0
77
S. Georgia
An observation: I just cleaned, deprimed,
Body sized and neck sized seperately,
Trimmed, and turned the necks of once shot Rem, and Fed brass. Ready to sort.
I weighed them all. Just over 1 grain difference from both brands, 235 to 236 grains. Then tested internal volume. Both brands measured from 4.55 ml to 4.65ml with most at 4.6ml
Two questions, is 1 ml to much veriation in a 300wsm, and is the only difference in this brass it's headstand?