Well then you should know that what the others have mentioned about loads and fast twists is a "rule-of-thumb".
Now that rule of thumb was born back in the days when barrels were hand rifled AND the grooves cut into those barrels were often 1/3 the width of the lands in the barrels. Plus those barrels had grooves opposite the lands. Modern barrels have equal width lands and grooves, and the grooves are opposite to each other. Modern rifling vs hand rifling compared looks thus:
So it was much easier back-in-the-day for the load to exceed what the rifling could handle, and the ball and patch to "skip" over the grooves and the shot to be inaccurate.
Then along came industrialization, and yes the rule held for a lot of muzzleloading rifles. The rule also holds that a conical bullet like a Minie Ball or a modern conical like a Hornady or REAL from Lee won't shoot well from a slow twist barrel slower than say 1:48 or 1:56....BUT the 1853 Enfield rifles imported from England for the American Civil War, often called the "Three Band Enfield" had then and Pedersoli repros have now..., 1:78 twist rates for Minie Ball shooting and they are favored target rifles. Totally thwarting the old rule, as far back as 1853. See it's not just the twist, but the width and the depth of the rifling....
So THAT makes me wonder why would Pedersoli, which has a vested interest in you the customer having success with any and all of their products, would suggest that you use a patched round ball and a load, when that would cause their product to be inaccurate ??? Maybe they know something that is counter to the old rule ?
The other idea that I would suggest is that such a heavy load while allowing you to feel the kick probably similar to the original Jaeger rifles (.58 being considered small by the Germanic hunters of the day), it is perhaps unneeded. You might try 70-80 grains of 3Fg with a .530 round ball, since that rifle is a .54, and you could find it quite accurate to the distances that you employ the rifle. IF that rifle is what you obtained and used.
LD
