Quote Originally Posted by Willis McPherson View Post
Now I have to know:
What is Enfield rifling? How is it different from ordinary land and groove?
Enfield rifling is the standard type that we are used to. The origional rifling was five groves, .005" deep, one turn in ten inches, left handed twist with sharp shoulders. The Metford rifling was .004" deep, with the same twist. However it was designed to deal with black powder fouling and was shallow with rounded shoulders.

For more info, I suggest that you read Ian Skennertonicon's book.