Depending on what you're using it for, maybe look for stuff like this:
Rio Royal Buck Low Recoil 12 Gauge 2-3/4in 00 Buck Buckshot Shotshell - 5 Rounds
OR
Aguila Minishell 12 Gauge 1-3/4" #4 Buck/#1 Buck 5/8 oz 25rds Shotshell
My main shotgun usage is for "bump in the night" type situations and either should work well for that. I bought a case of the Rio several years ago. It patterned and penetrated well, and seemed to actually have less recoil than the normal buckshot.
I bought some of the minishells which also advertise low recoil. The main draw back to them is that they allegedly don;t feed well in some pump shotguns due to the short length, but there is a company offering and adapter, and I bouight i for me mossberg pump. Haven't gotten around to trying them out yet, so can;t eally speak to recoil or function. IIRC my magazine tubes hold 5 normal shells, can should be about 8 with the mini shells. Are three extra shots necessary? Probably not, but they are there if needed (assuming that it actually feeds them properly).
Not sure what similar offerings are out there for other purposes, but might be worth looking into.