[ithacaartist]

I think it varies with the mag. as well as the gun. Slight variations in size in mags as well as the mag wells can add up and make them sluggish. Once the release button is held in, there shouldn't be anything to impede it from dropping out. Sometimes the top of the mag has been expanded a tad by use, and this will make a mag drag. You can probably check that with calipers, comparing dimensions at the bottom of the mag shell to those at the top. Then maybe a careful, slight squish in a padded vise or clamp would likely do the trick.

I've heard it said that the expectation of a mag to burst forth from the grip frame when the release is pushed is an American thing, and that Europeans are more tuned in to withdrawing the mag by hand.