FX Crown mag feeding issues.

I have a .30 cal Crown Gen2, that I purchased a couple of extra mags for. The new mags are identical to the original, but are very tight to install. As a consequence the feed hangs giving me a dry shot.
Having enough of that foolishness I got out a sheet of 400 wet or dry sandpaper, laid it on a flat surface, and polished both sides of the feed corner of the mag with good results.
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That fix works. Glad you got it back shooting. Another remedy is to loosen the barrel retention set screws, insert the magazine, then retention the barrel. Keeps it from "binding", but not loose enough to cause any issues.
Thanks for the input.
I would loose a lot of charge when a pellet didn't feed. I generaly shoot 3 mags of .30 cal, 39 rounds per fill up.