The three band Enfield (Pattern 1853 Rifle Musket ) with a 39" barrel had three groove rifling with a 1 in 78" twist.
The two band Enfield (Pattern 1858 Naval Rifle is the typical repro) with a 33" barrel had five groove rifling with a 1 in 48" twist.
Both of these have progressive depth rifling, which may not be reproduced in the repro. Both the rifles were designed for use with the Minie bullet, not roundball. With careful load development the rifles are quite accurate and here in the UK we shoot Enfields out to 600 yards (and have occassional forays to 800 yards!).
Have a look at the article on
Managing The Enfield on my web site for more information them.
David