7.62mm barrels

[gsimmons]

There are guys in the North South Skirmish Association who lengthen and line barrels all the time. One is Robert Hoyt, but I'm not sure if he still does it. He cuts the barrel if it's not full length, then inserts a shouldered liner of the proper length(42"for a M1842). He secures it with epoxy. I've not heard of one moving.