Look at a shell in the 5,000 psi range. Velocity in the 1100-1125 fps. A 3/4 or 7/8 ounce load are all designed to operate a semi auto which means higher velocity to generate enough energy to cycle. The "best" 3/4 or 7/8 loads never make the published data because they will not operate a semi auto. A one ounce load, at a modest velocity, will be kind on stocks, barrels and shoulders.

Shell: 2 3/4" REMINGTON STS, NITRO 27, OR GUN CLUB PLASTIC SHELLS 1 ounce lead shot
Manufacturer Powder Primer Wad Grs. Pressure (PSI) Vel. (ft/s)
Winchester 572 CCI 209 12P1 20.1 5,100 1,125
Winchester 572 Win. 209 12P1 21 5,000 1,125
Winchester 572 Fio. 616 12P1 20.1 5,300 1,125
Winchester 572 Ched. 209 12P1 20.9 4,800 1,125

All loads taken directly from Hodgdon reloading data. 572 has been and still is readily available and not as over priced as all Alliant powders are these days. I can buy it for $37.00/lb. Meters well. I also like it in the 20 and 28. Multiple gauges is nice when you are trying to select powders to keep on hand.

Titewad is going to get you into the 6,000psi plus range. 572 does 5,000psi. And that is for an ounce with 572 and 7/8 ounce for Titewad. Research is easy if you go to the Hodhgdon loading data web page. Just select 12, and powder you want to look at, then shot weight. It eliminates all the hulls they do not have data for. I then just select the hull I like and it gives you all the possible load combinations. Scroll down and select based on pressure and then primer and wad combinations. It does you no good to find a listed load for Remington primers, which are difficult to find and costing 130.00/1,000 if you do find them, or a wad that is impossible to find. The 12P1 is the new Federal 1 ounce podium wad which is easily found.

I do not use any AA data for the new two piece hulls. I have seen two AA two base wads separate and I refuse to use any hull which has a potential to separate and lodge in the bore. Hulls are so easy to find, for free, and truth is I have tens of thousands of better hulls. If you have the older AA compression hulls the data is good for their use. But I have bins of Remington STS hulls on hand and Remington gun club versions are everywhere for free.