[Paul Harm]

I don't like recoil - the reason for 3/4 and 1oz loads. I went from 1 1/8oz 12ga loads to 1oz, 7/8, and then 3/4oz loads and never saw a difference in my scores. International skeet and trap only allow a load close to 7/8 oz [ 24 gm ] - about 11 of #8 shot lighter. Both of those games are much harder than ours here in the USA. FITASC use to allow 1 1/4 oz of shot and went to 1 oz. Everyone complained but their scores went higher. The less shot, the shorter the shot column, the less set back, so more of the shot at the bottom stays round. This means more of the shot stays in the pattern. 1 oz of shot in a 12ga is only .690 high, in a 10ga it's .610 high. Both of those are way better than the great square load a lot of people promote. Claybuster wads use to [ and still may ] have a sheet of reloading data in their 3/4 oz bags of wads. Here's two, one for RD and one for CD. The wad is CB0175-12, 3/4oz of shot, Clay Dot, Red Dot [ or Promo is the same as RD only cheaper ] at 15.2 grs gives 1200fps at 5500 to 5900ps. At these pressures it wouldn't really matter what primer you used.
You won't find light 10ga loads. Go on here to Pete Lesters chart or just chose a mid 12ga load, say something around 8500 psi. In a 10ga it'll drop more than enough to where you're safe. Mine is 23.5grs of Green dot in any 10ga shell, any primer, 1oz of shot, and a Rem SP-10 plastic wad with enough 16ga fiber cushion wads in it first to make the shot column high enough for a good crimp. I've also used the same for 1 1/16 or 1 1/8oz of shot. You can cut the cushion wad any thickness necessary. BPI has paper and plastic wads. RST claims to use the Remington wad for a little more blow by for less pressures. And, you don't need all the junk BPI wants to sell you for cut shells. The regular Mec start crimp works just fine. No skiving is necessary. If you want to roll crimp I feel Precision Reloading has the best one. Have fun - Paul