Running a shotty is a lot of work. Someone once referred to it as a thinking man's gun. Clint makes reference to that. The limited capacity, single round loading, variations in loads, shot size, slugs, etc. you have to think through it's operation. Something about a shotty though. And slugs can be surprisingly accurate. A guy at the range, one day, was shocked when I was patterning off hand head shots on a IDPA target at 50yds with Brenneke's. I did have ghost ring sights on it though. The same rear one the Beretta has, but a different front. IIRC at one 3-Gun match, we were putting slugs through railroad ties.
I usually kept mine cruiser ready. That's -1 in the magazine and empty chamber with a mix of slugs and buck in a side saddle or butt cuff. The thought behind that is it allows you to choose your first round. If you need a slug, grab a slug from the cuff, load it in the magazine, rack the bolt. Then you can load another slug in the magazine if needed or backfill with buck. If you're short on time, just rack the bolt and you have buck. Backfill as needed. Like I said, thinking man's gun.