>>64431721
What mags are you using? If not Ruger brand, try Ruger. A lot of aftermarket mags suuuuuck from what I've been told (and from my limited collection of used 3rd party mags, it seems pretty true).

>>64431784
IIRC those were made in a pretty short window. Shame because it's a neat variation and it'd look good on certain models.
>2008: Five Millionth 10/22 manufactured, Trigger housings switched to plastic, extended mag release added, stock material switched to maple, Ruger Rimfire Challenge is started, finish on the receivers changed to a rough texture.
https://tincanbandit.blogspot.com/2016/03/1022-facts.html
I want to say that was switched back by about 2009 or 2010. I have to wonder if that finish swap was done as a temporary distraction for their switch to plastic trigger groups but I really can't prove it. Not that the plastic groups are bad; I've felt a couple BNIB that were better than worn in cast groups.

>>64431819
Factory or aftermarket barrel?

>>64431846
Aftermarket mags kinda sucked and Ruger BX-15 and BX-25 mags have a revision somewhere around the 2014-2020 era that improves their reliability and doesn't allow for the 22LR case shim fix anymore. Might want to try new mags if you're having issues. I have a 30rd doublestack the size of a BX-25 that split its epoxy/sonic welded seam on its own just bouncing around in a box. It's never been loaded since I bought it. At least I get to peek in one for a change as they're not serviceable otherwise.