Tested my mag with the shortened follower at the range. Two 50 round boxes of Federal Syntech. Hand racked the 1st of each 7 round mag (14 mags). Only 1 nose dived, but I think it was my fault not getting the slide back far enough. A simple 2nd rack pushed it in. (This 1st round racking could have been tested at home rather than at the range, but I wanted to test the cycling with the shortened magazine follower.) The gun functioned flawlessly through the 100 rounds.

I dipped a toothpick into white fingernail polish and made a dot on the side of the follower through one of the 2 holes near the top of an empty magazine. When filing the follower legs I could visually see how much I could shorten and still allow for the follower to cover the 2 holes on an empty magazine. I set the angle of the follower legs onto a carpenters bevel to insure the correct angle when filing was finished. I just rubbed the follower back and forth on a flat file until I removed enough. Didn't really need the bevel. The top of 7 rounds now feeds ok if I am not slow or weak about racking.

Zenshot,
     Why do you say they will be different? I have both a Charlotte and a Huntsville in black and the only difference I see is those 2 markings. Is that what you meant by different?

I have very little confidence in my ability to modify guns or even magazines. However, since magazines are "relatively" cheap, I may make similar changes to 1 mag and test it out before changing any others. If I do, I will post my results.

The 4 magazines that came with the 2 R51's that my wife and I own fail to chamber the 1st of the 7 rounds when the slide is racked back after the magazine is inserted. The 1st round gets nose dived into the mag when the slide moves backwards. If the slide is locked back before inserting the 7 round mag it usually chambers ok. Both guns are Gen2 and came with 2 mags each. The Rem phone helper a year ago said he has the same problem and the engineers are looking at the problem. He recommended that I carry only 6 rounds. The nose dive doesn't occur with 6 rounds. So, I carry an empty chamber and a 6 round mag. I haven't seen notification from Rem that the mags have been changed. Does anyone know if Rem actually studied the 7 round problem and have released improved mags?

It's my favorite.