I am curious if any of you shoot the 8x60 (.318 inch bore), or 8x60S (.323) Mauser?
I got into on a whim. i bought several rifles to get one I wanted out of a small collection. I traded off an Oberndorf full-stock carbine in 8x60S for newer 7x64mm carbine. Years later, I found super clean old Mauser sporting rifle in 8x60, traded to a Winchester collector on an 1873. He did not know much about them, and everyone was afraid it was a .318 bore. I bought it cheap enough, slugged the bore, shot some .321 bullets into potter's clay and measured them....323! So I started loading it.
I found a box of Prvi brass, and have been loading that. So far, my best loads have been with IMR 4064 under 195 / 196 / 200 grain bullets. I am starting to get the 170-gr Hornady to shoot well by stepping up the velocity. Many 8mm bullets are just hard to find right now.
I started this topic in another thread by mentioning that 8x60S brass can be formed from .30-06 brass. German snipers did this. They also used USGI 1903A3 Springfields alongside the 8x60S to get that brass. This 8x60S of mine came with a 1903A3, restocked German, with a Zeiss Marsteller 6x56 scope in claw mounts.