My friends and I have been working on some loads the last few weeks. Amazing how each load reacted in each of the guns.
I am shooting a Chambers Penn fowler with a 46" barrel.
I finally settled on 70 grains 2F, an overpowder card, 1 5/8 oz #6 shot (120 grains) in a heavy paper shot cup, and an overshot card. This gives me 58-64 hits in the head at 20 yards with about an 8" pattern, 31-35 in the head at 25 yards, and 17-21 in the head at 30 yards. 30 yards will be my maximum range. I was pretty amazed to get this in a cylinder bore. Most my patterns were poor to fair until I tried the heavy shot cups.
I tried each range 5 times with consistant results.
My buddy went with 65 grains 2F, an overpowder card, 105 grains 4/6 duplex shot, and an overshot card. He got 36 in the head at 20 yards and 14 at 30 yards.
I found I got much better patterns with the 2F.
There are a lot of good tips here, just keep working at it. You will find the one which works. Matt