I agree with UC, doubt you can make up 8 inches with a wad. I say also lower front or higher rear sight.

Sometimes raising the charge actually lowers the POI. Weird, but true.

Until you get some new sights, you can still find the sweet spot with these bullets. For that, it doesn't really matter where they are hitting, only that they are grouping, so just fire 3 shots with each load before going to another one. That way, when you get some new wads/sights, you will already have your load, just have to adjust your sight.