I'm talking about the notch on the magazines. on the side where the mag catch locks it in. If you forcefully do reloads, you will cause a burr in that area and it will drag when releasing the magazine. It's just something to check.
Those mags should drop easily, check the mag catch notch to see if it has a burr on the magazine, if so file it off. Arredondo mag extensions worked well for me, I think I was getting 23 in a mag in 9mm.
I think/believe it's more the stroke of the trigger than where the finger is placed. Also, may affect striker fired guns less than a single action, but just my opinion.
Needlessly, given the ease of scoring and instant posting of results that's simple to do with Practiscore.
I have never seen scores updated so frequently with practiscore, and there was no delay in finals. It was impressive no matter how they went up.