hawkeyesatx
AH enthusiast
A good starting load for the Lyman Great Plains rifle is 60 grs of FFFg, or 70 grs of FFg.
That should give you a good start load, and accurate for round ball.
The rifle with a 1:66 twist barrel won’t readily stabilize a long bullet, but a ball, yes!
You can work up to 90gr to 100 gr load of FFg, and not be worried about loss of accuracy.
The trick to better accuracy is to use a thicker patch, with a smaller ball.
A .490 ball works quite well with thinner patches, but a .480 ball and a thicker patch will work better!
Hawk
That should give you a good start load, and accurate for round ball.
The rifle with a 1:66 twist barrel won’t readily stabilize a long bullet, but a ball, yes!
You can work up to 90gr to 100 gr load of FFg, and not be worried about loss of accuracy.
The trick to better accuracy is to use a thicker patch, with a smaller ball.
A .490 ball works quite well with thinner patches, but a .480 ball and a thicker patch will work better!
Hawk