Found an interesting article on Rifle barrel boring and rifling. How its being done through the years and Various methods.
The topics dealt in the article
The Steel
Drilling the Hole
Reaming
Cut Rifling
Button Rifling
Hammer rifling
The advantages of the above mentioned methods and disadvantages.
And so on..
http://firearmsid.com/Feature%20Article ... acture.htm
Thanks and regards
MP