If you actually shoot one of those, you are a braver man than me! I hope you are using reduced loads.I don't know that it qualifies as rare, but it's one of my more unusual guns. Vetterli Carcano M1870/87/15, rechambered from the original Swiss 10.4x38 mm rimfire to 6.5 Carcano. I like it for its kind of "Steam Punk" looks.
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M1870 Italian Vetterli - Wikipedia
en.wikipedia.org
I've shot it with PPU Carcano ammo with no issues. But no, I'm not sending thousands of rounds downrange with it for sure!If you actually shoot one of those, you are a braver man than me! I hope you are using reduced loads.
For the OP, I have taken an all matching, mint condition, German G43 to the range.
A2 squad, assemble!An AR with only iron sights...