Grizzly mag feeding problems

You sand the two top parts of the mags, where the shells feed out from. I'll try to post a pic later. You have to round them out a little so that they don't catch the shells as the gun cycles. The best way to test it is to put the safety on and cycle two unfired shells through it. Smooth out any rough spots.
 
I had to shorten the mag spring on mine there was to much pressure and now i can run 3" shells through it. I also had to polish the feed ramp. Good luck.
 
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