The 20 ga load in question is a standa d target load so there should be no problem using it in any of the 20 ga guns mentioned. There are some factory 7/8 oz loads running in the 1150 fps range that should work just as well. Remington and one of the foreign manufacturers used to make a 3/4 oz load but I am not sure they are still around. I load a 3/4 oz load in the 20 ga for sporting clays and it sets the triggers on my Citori with tubes so the Broadway should work just as well.
The 12 ga loads should function fine in all your guns too, except maybe for the 24 gram load in the A-5. There are even more options with the 12 ga as there are 1 oz loads in the 1150-1180 fps range by all the major manufacturers. Winchester and a couple others make an even lighter subsonic load that will have no problem working in a pump and most O/U guns. They even work in some gas operated semiautos such as the Beretta 390 and 391 with at least a 28" barrel or the proper Cole spring.
