Also a good N-SSA beginner's rifle.
A rough copy of the never-issued Remington contract to the 1863 rifle-musket. They first appeared imported by Navy Arms Company in 1961, made by Antonio Zoli in Italy. That barrel is superb for competition shooting.
However, this rifle is a little bit outside the realm of this Forum, since its not a longrifle in the proper sense. I recommend you'll get a better response on the Muzzleloading Forum (PM me for the website address, if needed). They have sub-forums divided into historical periods, including CW.