257 data needed

[forestwalker]

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]

.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/ubbthreads/showflat.php?Cat=&Number=200227&page=1&view=expanded&sb=5&o=&fpart=

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

http://www.reloadersnest.com/query_bw.asp?CaliberID=239&BulletWeight=115