Mule Deer,
Fwiw, after reading your original post, I called C.E. Harris (who has forgotten more about firearms & loading than most of us here will ever know) & asked him about 2 3/4" shells in 65mm chambers.
His comment was, "Well, he may get away with that & he may well lose some fingers, too. Bad plan, in my opinion, as most of those old Euro barrels are thin & many of them are unsafe with any modern shells."
Reference: the fellow who lost his left hand to an exploding shotgun barrel, I'm going by what the ER doc said that caused the injury.
As for me, I'll be cautious & have all antique firearms CAREFULLY inspected by a competent smith before firing them.
(Fyi, I started collecting hammer combination guns of various sorts in 1969.)
Note: I have a "reissued for WWI" 1888 Commission Rifle that has the "S-marked chamber". Nonetheless, it was NOT re-bored to the standard 7.9x57mm (.323 bore) size. = It shoots .320 PBCB using 10 grains of Red Dot @ 1400FPS beautifully.
just my OPINION, tex
Last edited by satx78247; 05/08/18. Reason: addenda
