charlie brown,

I did some testing with my 50 cal. underhammer this week, someting maybe you can use.

I have moved out to 100 yards for my testing and also use a scope. [just for testing, can't see sh!t without it!] After testing is done , I will be using my glow in the dark peep setup. But to find if one load is better than another the scope really helps!

I am using a 27" barrel with 1 in 30 twist.
Goex black powder.
CCI caps
3 shot groups.

410 Hornady Great Plains with MMP sub-base

90fff-2 9/16
115ff-2 5/16


TC 370grain Maxi, lubed with Bore Butter

115ff-2 1/8

On the maxi balls, I cut the fingers off a green sabot and also used a thin .025 card board in between.

Powder, sabot, card, and bullet.

BS