Ok Now that you all really got me confused on inletting the tang and breech ( just kidding very helpful infromation was given ) I am looking at barrels I know what I want but is it out there and I am just missing it ..My build I am planning on doing is a Southern mountain just a plain stock nothing fancy but I want a 40cal 44" long with a 1-60 twist all I seem to find is 1-48 as I will be doing nothing but patch and round ball I perefr a lot slower twist rate any suggestions ?
A 48 twist works fine to at least 50-54 caliber.
Current Green Mountain 40s are a 56 twist I think. Though why they thought it necessary to change it from 48 I will never know.
There is a lot of BS and myth around about round ball twists. Most of it stemming from 48 twist barrels made with shallow "naked bullet" rifling and peoples attempts to shoot PRBs in them. This experienceh as no bearing on a rifle with .008 to .012 grooves and a 48 twist.
All original Hawkens were 48 so far as anyone knows.
But people have the notion that 48 is too fast. It is not and in fact for most calibers in use by moderns it may well be the best twist.
In calibers over 54 a 66 or 72 might be better and over 58 I would not want 48.
But then the old Douglas 66 twist worked fine in everything they made....
But a 40 would likely shoot good with a 36 twist.
Basically in barrels rifled properly for a cloth patched bullet almost any reasonable twist is as good as another only the extreme ends of the spectrum would be problematical. A 96" twist 69 caliber is OK but a 96" 32 might be too slow.
Dan