MSR Shooter and Builder, Precision Bolt Action Rim & Center Fire enthusiast. Glock & 1911 pistoleer
I've been pondering the same thing since I got my 3-1/2" Super Mag I have been wanting to experiment with certain 3.5" buckshot loads that are not factory available like #1Buck .Squirrel, turkey,rabbit and close up yote.
Not really interested in savings as a main factor. But would be nice. I just really enjoy loading my own ammo.
My only problem has been finding 3.5" shells/hulls and the shot wads.
Not that that project is a big priority I've got a decent amount of 2-3/4" 00 Buck. And I'm starting in 3" #1 for testing.
That's all in factory ammo right now. I don't even have a loading setup and many seem desiged for birdshot not buck shot or slugs.