MJS:
You shan't need a gunsmith for the chamber as it is most simple. Borrow indefinitely a wax candle from your significant other, then with a piece of papertowel & wooden dowel, push the paper within say 1/2 of the beginning of the rifling. I'd lightly lube the chamber and then ight the candle & let the wax drip until the chamber & rim is full. Bump it a time or two making sure the fluid wax settles. Let it cool and tap it out. Then you can use Cerrosafe or similar.
With 7,7mm plug gauge stamp & the 14 gramme bullet weight(14.7 grammes was the 0.318"/88 bullet weight), it is probably the 8x57 IR. Slug the bore to see.
Cheers,
Raimey
rse
