Last year after I attended the CMP M1 Garand Advanced Maintenance Course I decided to up my M1 game by purchasing one of these bad boys:
He makes one that holds 75 rounds of shotgun in 3 pouches of 25 each, so I ass-u-me each pouch either fits a conventional 25 round box or 5 five round boxes (since thats what is shown). He says: It's not made with any three-gun matches in mind. If you want speed, buy those bandoliers. This was designed for real-world situations, and in the real world the first thing you should do when being fired upon is to get your butt behind cover. Once you get behind cover you can reload when you need. And if you're under fire, you'll want all the shotgun shells you could possibly carry.
https://olongapooutfitters.com/equip...n-grab-and-go/