I have a few question.
It was advertised as a 9.3x53r but its import mark reads 9.3x57.
I know a chamber cast is in order but I'm trying to narrow it down before I have to do it. A 7.62x54r will not fit in the chamber because it was to fat but a 8x57jr and 8x57 will. The bore is mint and I stuck my calibers in the muzzle and it read like 9.22ish.

What peep sight base it that?