I don't have a sidesaddle.
I used to have a leather butt cuff like Smoke has on his.
I used to have leather shell pouches, and leather shell holders like the CAS shooters use...anyone finds my two leather shell belts holler - will you please ?
Umm...I have a 10X shell pouch I won years ago with a matching range bag. I use for skeet , 5 stand, sporting clays, trap , quail , doves ...well you get the idea. Once I get used to something I kinda stay with it.
Somewhere I have a dump pouch dealie...I got a pocket ... works for when I go do my thing and run stages. The 10 X shell pouch works too good for me - so far.
For HD ...well if it takes more than 5 I'm going to sidearms...or tennis shoes. Wait , reverse that - tennis shoes first.
Then again another good thing about a full stock on a shotgun....it swings real well , and gathers some momentum before it makes "cranial contact".
Practical , Minimalist , Blue&Wood member here... like the song says I'll never....
....picture on the cover of the Rollin' Stone...