I have a German Drilling gun from the 1920’s 1930’s and i am trying to
figure out the riffling.
The numbers on bottom of the barrel for the riffling are faded.
What I can make out is 6,5mm (this is what the top number looks
The bottom number is hard to make out the first number may be a 5 or
it may not. The second bottom number may be an 8 or a 6 or a 0 or a 3
or a 5 (all i can make out is the bottom half of the numbers) . What
is clear on the bottom number is that at the end of the second number
it has “1/2” marked (a small
number 1 over a small number 2).
Also the S.t.m.G is 8gr.
The shotgun barrels are 16g. 2.5"
I suspect its a 6.5mm x 58R but the “1/2” marking at the end of the bottom number is confusing.
I intend to get a casting done by a gunsmith to determine caliber,
however I would like thoughts on what this caliber may be.
Any thoughts you may provide would be