I essentially load only low pressure loads for my 12g vintage guns and .410. That's it. I don't have a need for a huge variety of loads like Jon. But I do substitute shot size in my basic low pressure recipe, to allow for different use: 7 1/2 for clay targts/quail/dove, 6 or 5 for chukar and phez.
I also shoot a heck of a lot of promo loads in my modern guns. I don't load for them. If I don't want the 12g promo recoil, I shoot 20g promo loads in my 20g guns. Is there a quality difference between what I'm capable of loading and promos, of course. Does it matter to me in my casual clay shooting or quail/dove hunting? Not a bit. I reload and shoot promos. Neither is to save or make money. If that were the goal, I'd stop doing the activity altogether. Heck think of the cost of all the equipment that needs to amortized to load. Basically I shoot promos because I'm lazy. I shoot my reloads in my vintage guns because it's more convenient than chasing down special low pressure loads every time I want them. My press is a turret type and can crank out a flat in an hour or so if I'm being slow and methodical. That's a lot of hunting loads.