Go on line and look at the Winchester loads. With the WWlite powder you have a lot of options. I use it for my grandkids and I like it. The Federal Super lite is nice but hard to find. Both manufactures get there different ways. So you have some options in factory loads. I've not used the Remington loads.
I've shot a lot of 7/8oz for singles and doubles with excellent results. I've been loading STS Remington,7/8oz #8 shot, claybuster CB-0178 gray Winchester style wads with 17.2 grains of clay dot and a cheddite primer. Been a very nice load for me over the years. Should be running around 1180fps. Light recoil and smacks targets right in the mouth. I've also just started messing with a 3/4oz CB 0175 Winchester style wad and 16.7gr of claydot same everything else. That is about 1300fps. I shot a box of them at singles and wasn't very impressed but they seem to boil the first shot of doubles really well and the recoil is so minimal that it enables you to recover quicker for the second shot but the jury is still out on that. I am trying out 15.4 grains of Extra Lite in the same 7/8oz shell this weekend which is suppose to be 1200fps, that's suppose to be a nice load and a 16.0 grain drop for the 3/4oz for 1300fps.
Take a look at the new Claybuster 3/4 oz wads. Claybuster packs reloading information with the wads that includes several 3/4 oz loads @ 1200 fps using Extra-Lite, Red Dot and Clay Dot. They are about as low recoil as you will find in an effective 12 ga load.
Go for a 7/8 oz load with either AA lite or Extralite powder at 1200 fps or a bit more. I've had good experience with these. Slower burning powders tend to give inconsistent velocities and patterns unless you drive them at about 1300 fps and those are not soft shooting in my book.
My arthritis makes for pain IN my shoulder after shooting so for years, I've loaded an ounce of shot over 19.0 grains of PB with a Windjammer wad and a Remington 209 primer in STS hulls. It chronographs at 1,130fps, shoots soft but still breaks targets hard.