12's 16 & 20 I keep in factory boxes. 10's hard to find factory cardboard boxes and if you do they are sized for 3 1/2 Inch Shells.
MTM's SF 100 100 round shell box is only available for 12 & 20 as far as I know. However Ballistic Products listed a 10 G 50 shell insert that fits the SF 100. It's number ST-10-40
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Bought a couple they work well. I guess MTM figured one tier of 3 1/2 inch 10's in the box but if you grind off the small feet bottom of the insert you can get 2 tiers of 2 7/8 inch 10's in it for 100 rounds per box.
I am going to the Southern with 4 boxes full of short 10's
William
Short 10 Boxes
Threaded Mode