Quarterbore's Forums - 257 data needed

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forestwalker

01-03-2006 12:56 PM

257 data needed

Can anyone give me max chamber pressuers on the 277 STW or the 25x300 win mag and any other info you may have. I am considering one of the 2 for an upcoming project

Carpe Diem

01-04-2006 12:49 PM

.257 STW is based on the 8mm Mag case: max pressure is 65,000 psi
The max pressure for the .300 WM is 64,000 psi. It's a wash there, but the STW holds a lot more powder.

http://www.24hourcampfire.com/ubbthr...sb=5&o=&fpart=

http://www.gunhuntermag.com/Features/030818Tamale.html

http://www.reloadersnest.com/query_b...lletWeight=115

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