Gents
Can some one tell where to find or does some one know the standard bore and groove diameters for the old 8mm Mauser?
I know they will vary greatly do to the various wars and manufacturing periods, manufacturers, countries etc. but there must be some agrred upon size.
Any info will be appreciated.
Jim

Pg 79, Kuhnhausen, "Mauser Bolt Actions"
8mm Mauser (8x57JS)
.311/313 bore
.323/325 groove

Even Turk Mausers with minty bores are measuring .325" across the grooves at the muzzle for me.
All the bullets are .323".