Quote Originally Posted by PhatMan View Post
vbull,

Have you tried a small base body die ?

The SSG, IIRC, has rear-locking lugs, and so you would get greater case expansion than you would from a forward locking-lug action.

If your other rifle has a near min-spec. chamber, then the body die would help re-szie the cartridges to fit - Redding make an excellent small base body die.

Have fun & a good Sunday,

Best regards

Russs
That's clearly true, but I'm amazed that anyone would still design an action like that. The advantages of it are mainly to shorten bolt-stroke and ease turnover for manual rapid fire, as in the Lee-Enfield.

I doubt that factor alone could cause the OP's issue. Treebone's recent comment matches the experience I noted earlier with an over-deep 303 chambering. If incipient separation lines are present, it seems certain to me there has to be a problem with the SSG's chamber as well.