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I recently switched the HD ammo in my M4 from 00 buck to 04 buck. Even though they’re both 2 3/4 Federal Premium, the 04 buck shells are apparently just enough shorter that I can now fit 7 shells in my ti CC mag tube whereas of the 00 buck I could only fit 6 in the mag. While the 7th round of 04 buck does clear the shell stop, its just barely and I can only shove it further into the mag tube by 1/8”-1/4” and releasing the stack of shells back onto the shell stop seems to put quite a bit of pressure on it. Am I at risk of doing any damage to the shell stop by leaving it so tightly loaded, or am I overthinking this and if 7 shells fit, that’s the end of it?

Glad you got it worked out op

I don't think mine is the M-lok version because I've never used that system. Mine has a QD and I think a pic rail on the other side....here's a copy of my invoice if it tells you anything. Mine is the .8 version. Mine is brand new but has been mounted to make sure it fit correctly when I got it...so there are probably some tiny handling marks on it. Interested? ==== Items ==== Benelli M4 Light Mount - .8 Inch Light Ring SKU BM4-8 Weight 0.50lbs Quantity: 1 Price (each): $179.99 ==== Order Totals ==== Items: $179.99 Shipping: $5.80 Tax: $0.00 TOTAL: $185.79

That's about normal for the shells. The 7th round barely fits in most cases. Mines left loaded all the time for about a decade now with no negative effects.

scratch that, I got it. The bolt needed to be forward for that last half inch...