Yes, I have a couple of the .050" - .0625" taller "tactical" magazine catches that gave me the same problem. I do not have a license for a Dremel so I sent one back to Brown, who said I had an early catch, their later ones had a positive stop. They did not provide one, they just ground some clearance. The next case I just showed to FLG and he ground the necessary clearance.
Be careful to maintain the contour and don't cut so deep that it shows outside the frame.
Be careful to maintain the contour and don't cut so deep that it shows outside the frame.