My plan is to duplicate 2 loads I have for my 12 ga, but for 20 ga. (rifled barrel, Savage 220 slug gun)
#1. Lee 7/8 oz using a Lee REAL .54 cal. and 20SO1 or commander wad.
What size hard card? 28ga?
#2.
This is using a brush wad and 20ga fiber wad.
Accurate slug-full bore.
I guess the million dollar questions is what size wads anf cards for a 20 ga?
-I know that is not a gold medal hull in the pic-