it possible to identify a particular obscure brand of 2.75" shell and know, "that is a legitimate, low pressure target load"?
Yes, but you have to ask. I wanted a low pressure, readily available dove load for my Brit and Parker 12 ga hammer Damascus guns, one with 2-5/8" chambers and one with chambers stretched to 2-3/4". Settled on Fiocchi training loads, 2-3/4", 7/8 oz, #8, 6600psi confirmed by Fiocchi. About $7/box on sale and usually available at my local purveyor of target ammo.
I used to reload, but don't anymore. I also used to shoot only 12 gauge, but now am shooting everything from 2-1/2" .410 to 3-1/2" 12 ga goose loads, depending on the occasion. I don't have the space, time, or inclination to load for everything I shoot. Maybe when I retire, but then will probably reload only for .410, 28 ga, and short low-pressure loads for some of my goofball old guns.
