Some brands will feed from a magazine and some wont. I bought some from a hardware store that wouldn't, but bought a box of 100 from Amazon and they feed from the magazines just fine.

Could be different brand and it doesn't function like the brand I have. Just got thru running one in a Ruger 10/22 Takedown and the PMR-30 after I finished cleaning them. The PM-30 is sometimes a problem if not seated right in the longer magazine.

Speaking of screwy mag's and such, I had trouble with some Win 22LR HP not feeding in the 10/22 Takedown and only in the one mag. They fed fin in another mag and the mag that would not fed the 1300fps Win fed the new Win 1070fps Subsonic HP ammo. Now explain that one! Guess I'll break out the measuring tools and see what if anything shows up.

__________________
Cranky Old Retired USN Guy