7; you probably won't get many takers on this one, but P.O. Ackley mentions 43,000 psi for the Swede, but wasn't sure where it came from. I wouldn't chamber one for a .308 Win or it's derivatives that go up to 55,000, but there are some golden oldies for .473-.479 bolt faces including the original 6.5 x 55 that are great cartridges and perform well at around 45,000. I don't think I would push one to 50,000. I've seen the small ring Spanish Mausers chambered for .308 Win, but I wouldn't shoot one or recommend one.
Just my opinion, Tom
On edit: watch out for the loading manual loads for the 6.5 x 55. The Nosler book for one says that the listed loads are for modern guns and to "have a military rifle checked by a competent gunsmith" ? What's a 'smith going to do to determine max safe pressure? Try to blow it up? A couple of loading books list psi or cup. I'd hang up at around 45,000. The Swedes are fine actions, and you can check regularly for bolt setback if you think you're pushing it.
Texas State Rifle Association Life Member
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A big fast bullet will beat a little fast bullet every time
Last edited by specweldtom; 02-29-2008 at 12:24 AM.