If you are looking for accuracy and don't have to have a lot of knock down power, try backing down on the powder charge. In working with 4Her's, I found that the .58 Zoli (three different guns) 3 LG rifling worked very well with a thick patch and smaller balls. I was able to get a 1.5" group at 100 yards with a .018 patch and a .565 ball. Lube was bore butter fully soaked patch. Powder charge was 42 to 48 grains of 2f Goex. Also had good results with 85 to 100 grains of 3f Goex. (Did this before I knew we were limited to 60 grains of powder.)
Don't know if this will translate to .69 caliber rifle. The 3LG rifling seemed to have a zero at a low charge and a high charge and shot lousy in the middle size charges.
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Edwin Flint
14th Mississippi Infantry, N-SSA
Deputy Commander, DS Region
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