I try to rotate through my sxs guns. I have a couple of Fox guns which are my core clay guns but I bring others on a regular basis. In a club with 425 members I'm the only sxs shooter and the other members regard me as some kind of nut.
I have been accepted as a nut for only shooting SXS for skeet (mostly) and sporting clays (rarely). A handful have even bought a SxS themselves, but nothing as old as the ones we routinely use.
As for low pressure 2.5" ammo, try
https://www.cartuchosarmusa.com and their "Classico" ammo. Listed as under 7,000 PSI. In the US they can be bought at
https://ammofix.com. Not cheap, but less expensive than RST
