And you do this why ?
...tj3006

???? Why would you risk cutting your bolt face from primer blowby/ blown primers?

Clark,

I won't waste bandwidth just to say "why did you do this?", or "buy a bigger gun", rather, thank you for an interesting experiment that is useful, especially with the pics. It illustates at least three things:

- ammo tends to provide warnings of a progessive nature as pressure gets progessively higher (but not always, and not according to any strict rules);
- you can "safely" exceed loadbook maximums in some guns; and
- the chrony is a good indicator of excessive pressure. If you are getting 300 Win Mag numbers out of a 308, you are headed for big trouble.

P.S. I am glad you did it because I wouldn't unless it was a gun I could afford to blow up and I triggered it remotely.

Andy