GJM, I exclusively use MecGar mags. Coming from a G17, I found the bevelled well on the Elite II a real treat compared to the well on the Glock. I do find when I get a bit off center to the side it will result in me bouncing the mag out of the well. Front or back is much more forgiving. I find with the Beretta, tucking the gun closer to my body insures a better reload as it positions the mag well a little more in line with my mag insertion. Getting a visual lock on the mag well helps me a lot.
I do find that spending a week practising reloads with my Centurion, which has a non bevelled mag well to really speed up my Elite II reloads.