Not a Weaver 7/8" mount and not a 3/8" rimfire...

by Hoot , Diversityville, Liberal-sota, Tuesday, December 08, 2015, 11:29 (3212 days ago)

so, what is it? I bought a Bausch & Lomb one-piece mount for a Model of 1917 sporter (actually, 3 of them, but that's another story). I paid the 'smith to mount it to the rifle. All of this was under the assumption it was a standard Weaver type 7/8" dovetail mount. The rings will not tighten down far enough to grab. Measurement across the wide part of the mount shows ~.740". Metric? Maybe 18-19mm....

What other systems were tried before the Weaver became standard? Can I still find rings?

Sheesh....the things I get myself into.