I just finished a 24ga. X 48" barrel and shot for pattern yesterday.
The big hole is from a patched round ball, to verify my sight line was on point form 25-30 yards. No jug choke, no shot cups, this is what has come to be called the "Skychief Load",
Powder charge
Nitro (hard) card
Shotload
Thin overshot card
Full fiber cushion wad*
In my case I used 80gs. ff, 1-1/2 oz., #4-#6 mix. I have used this mix in hunting successfully for years, a guy gave me a two liter bottle of it and I think it will out live me.
I am very impressed with this setup, I have experimented with jug chokes and shotcups for years and this load has out done them all.
Robby