Horrible Accuracy Problem

[Mike.44]

Had a much better day today at the range. First I had some Minies I received from DIRT Farmer that shot well. I had some Heavier (535 gr) Minies with a very short skirt look promising with 70=85 grains of Swiss FFG. They both did about 2 1/2-3 inches at 50 yds. I am sure that group can get smaller once I get a better regimen down and learn the pecularities of this rifle better. The previous owner had a taller front sight installed an it will need to be lowered(filed) once I figure the best boolit/powder combo. It shot just a touch left, but a full 15" low at 50 yds.
Mike

[Sharpsman]

I don't think that rifle will EVER shoot conical bullets well with a 1-78" ROT!

[dondiego]

After 3 years (age of this post) he might have gotten it figured out.

[fouronesix]

I don't think that rifle will EVER shoot conical bullets well with a 1-78" ROT!

You need to research the subject of the slow twist rifle musket and the Minié before making that statement. I have several slow twist rifle muskets, both original and repro that will wallow out a single 1-1 1/2" diameter hole with Miniés at 50 yds. The OP's gun was designed to shoot a Minié. Whether or not that individual gun will ever shoot well with any type of projectile is an entirely different thing.