All .22RF rounds have lube
On the bullet. They use and outside lubricated heel type bullet. Generations ago it was the same, except that the bullet lube oftgen used was somewhat stickly, and would pick up lint and debris.
Somewhere around 50 years ago (not sure exactly when) the change was made to a dry waxy lube, which usually did not pick up random debris.
The reason higher priced .22shells seem to work through your mags better is not because of lubrication, it is because the ammo is higher quality with better kept tolerances than the cheaper stuff.
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All else being equal (and it almost never is) bigger bullets tend to work better.
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