Pedersoli rifles do go "bang". While I agree w Getz the locks are not up to a Jim Chambers standard, they do work.
I began shooting muzzle loaders when I was 14, with Grampa's single barreled shotgun, then didn't touch black powder for twenty five years until last spring. Bought a Pedersoli Lewis & Clark commemorative Northwest gun from Cherry's fine guns. Other people's Pedersoli NW guns work fine, but my lock isn't worth a bucket of warm, uh, refuse.
Have a Pedersoli Frontier Delux, or some such, in .45 cal, lock works fine. Shoulder problems led me to a short-barreled Dixie Cub Deluxe, also Pedersoli, in .40. Lock works fine, even though it looks a little weird. Searching for something I could hold got a Dixie (Pedersoli) Jaeger in .54. Lock works fine & incidentally lock is a close copy of a Siler lock, except thinner bolster. Love the Jaeger, comes to shoulder well, and .54 is a good hunting & Indian fighting caliber. US Army used .54 cal for their round ball rifles about 1800 through 1855. US Army has always done a pretty thorough job. You can get a more authentic custom made Jaeger for $1000-2000 more.
You can buy precast or swaged balls & all other needful accessories from trackofthewolf.com They ship quickly, reliable to deal with.
SCLoyalist made you a great list of stuff.
Pedersoli guns can be had from dixiegunworks.com Dixie is reliable, been in this business since the 1950's.
A custom made rifle will look a lot better than Pedersoli, and in some respects may be easier to shoot. But you will pay another $500--1000 min for that advantage.
Can't help saying this. Pedersoli barrels are made of a quenched and tempered medium carbon steel, Italian spec C40. Translation--they use somewhat better steel than did Springfield Armory in the .45-70 trapdoor model. I am a metallurgist and more concerned about my bzrrel steel than are most on this forum.
All I hear about Dixon's is that it is the place to go if one is fortunate enough to reside in the Keystone State. I am an ex-pat, here in Michigan.
There is a lot written on muzzle loading shooting, some of our contemporary Ph.D. Authorities (no offense meant, Professor) are great writers but, well, just plain full of it. Find an old copy of "Ballistics and the Muzzle Loading Rifle", by William C. Herring, published by the National Muzzle Loading Rifle Association in 1974. Me, I find my out-of-print stuff at abebooks.com