The issue doesn't seem to photograph well, unfortunately, but it's very clear when looking at the rifle - there's noticeable wear in the six o'clock position.

The PPU rounds had 174gr FMJ BT projectiles while the Federals were 180gr JSPs and the Remingtons were 180gr round-nosed soft-points. I also put some PMC rounds loaded with 180gr Sierra GameKing projectiles through it, with the same results - keyholing ahoy and no accuracy to speak of. The rounds all performed fine out of another rifle so it definitely isn't the cartridges.

I don't have access to any decent military surplus ammo (Might have some POFicon somewhere if I go looking for it), but the reality is if I can't shoot the rifle with commercially available ammo it's going to be an issue since I don't reload at present and I'm not really interested in scouring the gunshows for Cartridges From Yesteryear™ because the ammo is either priced for collectors or in pretty average shape, plus it's corrosive.
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