Well, I don't know how these stack up to what was in the pouch originally, but here are a few of the sizes I used to shoot.
For example, the ball on the left is a .530; next one is a .820 (8 bore) and the far right is .980 (4 bore).
The 4 bore had been shot through four 25 pound clay blocks and then dug out of about a foot of frozen ground. I think I cast it out of wheel weights. I seem to recall having a few of these that were unfired, but God only knows where they have disappeared to. As I recall, one had to heat the lead up pretty hot to get it to cast right, it weighs about 1,450 grains.
That's all I got for now.
John (Bigsmoke)