Atlas springs and followers in MBX mags?

[DukeSoprano]

I thought I would change all my springs and followers in my 170s, 38 super comp MBX mags with Atlas. Yes I could now load 29 rounds, but couldn't get them into the gun unless I downloaded to 28. I had let them sit with 29 for a week and tried them at our clubs Thursday night USPSA practice night.

I had dropped a few of them during reloads and when I went to unload them, 1 of them had a bullet that had slipped below the follower, another mag had 2 slip below the follower.

 

I really don't want to squeeze the mags so I assume just put the MBX followers back?

 

Thanks,

Jeffrey