700x has been my goto powder in 12ga 2 1/2" loads for trap, skeet and SC. I load 11/16oz of 9's for skeet and 7/8oz of 8's for trap and SC. Back when I was shooting competitively it was 700x under 1 1/8oz in a 2 3/4" hull, I was a lot tougher then and my shotguns heavier. I also loaded 170gr cast bullets for my 300 Sav to hunt fox when pelts were $100/ea, most of my target loads in the 38 Special and 45 ACP used 700x. Bismuth and ITX loads get PB, I stocked up when I saw it was going away. Coyote loads and .224 light loads(222 Rem, 5.6x50R) get 800x.
16ga 2 3/4" target loads back in the last century used it also but have gone with Greendot in them when going to 2 1/2" for all my 16ga target stuff.
