Leaderboard

I have to admit, I had no idea what an M26 MASS was....so I looked it up. https://en.wikipedia.org/wiki/M26_Modular_Accessory_Shotgun_System All I can say is, what a stupid freaking contraption that is! Looks super fragile like if you dropped it or banged it hard against something it would break or knock something out of whack. Who would like to lug around such a contraption? How unwieldy do you think that thing is to handle? Who comes up with these brilliant ideas? Stupid.

I run Hornady Critical defense and I've never had an issue.

I run the Hornady CD as my home defense ammo. No problem cycling it at all.

i ran 2 boxes of that and it ran fine for me.

The length of the shell is actually derived from the measurement of it before it is crimped down or rolled over the load. Since the shell has to be fully expanded and cylindrical to allow the wads and shot column to pass through without any excessive pressure peaks, the crimped section (whether rolled or petaled/folded) has to be completely cylindrical. Thus the chamber length is the actual “measurement” of an “Uncrimped” shellcase. ( actually, the chamber is fractionally longer than the factory made shell case) I think that the reason some people have trouble fitting 7 in the mag tube has to do with the variance in the length of the springs, and how many coils each spring has. That, coupled with the variance in the length of the shells from maker to maker can tolerance stack. They are not all made to exactly the same length, the length can vary from spring to spring. I highly doubt that you can did any damage as you say, trying to force that 7th round in. You could buy a couple springs, or clip a coil or two off of your existing spring and try that. I'm not a fan of the idea to remove the mag spring retainer as a possible solution.