just my experience, your mileage may vary
Hi: I had run into a problem with Browning hyper .22 hollow point ammo. I have a 22/45 Mk3 target version.
Never any feed or eject issues in over 5000 rounds. Then I tried to shoot some of this up as I can't use it in my favorite plinking rifle.
Anyway, with one mag, after the last round, it would not hold the bolt open. All three of my others worked fine. All of my mags are factory, all have been tuned up long ago following the directions of a gunsmith on another forum. The feed ramp has been polished. Then I gave them all a bath in Hoppe's blew them out with a compressor swabbed them with pipe cleaners, just to cover all the bases.
So this past week, I took the brownings and another brand (Norma TAC-22) to the range. After warming the pistol up, I fired the offending mag. Same issue happens. Then the next time around, fired all my mags with the Norma, all functioned perfectly. Tried another round of brownings, same issue. back to norma, perfect and so on.
Now, I do not own a micrometer so I can't swear to it, but it seems the only issue could be the case measurements. The overall length of the cartridges as best I can tell with a ruler is the same.
Lesson for me, since I can't fire them in my rifle due to buffer issues, and can't fire them in my pistol due to function issues is that this ammo is now not welcome in my armory.
life is good, have a great weekend.