Loading AA HS handicap loads with Super Handicap powder and WAA12 wads. Have to reduce powder charge because I shoot at high altitude. Load is loose and pattern is scattered. Had a suggestion to tighten up by using a 1 oz. wad. Have a ton of the dense powder and would like to use it up by loading slower loads as well and thought this might be a solution. Any thoughts or experience?
It's a common solution to a common problem so if all you're looking for is a taller stack height taller wads will work just fine. Don't know what you mean by "scattered," pattern but that's a whole different discussion.
Low pressure/low speed, choke to open, distance to far. Which factory load? You should provide more information if you're asking for help.