Bill!
We have here in Finland word "krymppaus".It means that gunsmith makes choke to rifle barrels muzzle.
Have you made this and if you have I am interested to hear your results.
To our old gunsmiths it was normal work,but to younger I think it is too "dirty" job-
.
Old smiths has little differences their own measurements/working methods and depends little of barrel steel,but basic was/is like this:
They run in lathe barrel muzzle outside diameter to about 0,59 " thickness, 0,75-1,0 " lenght.
Made bushing about 0,0012-0,002 smaller inside than 0,59".
Put barrel to deep freezer and heat this bushing 250-300 degrees C or over and put bushing to barrel muzzle.
I think you use word "washed out" and it is/was problem especially with hammer forget barrels.
But many times this method made also with cut rifling and button rifled barrels to better accuracy.
This came my mind when I read your reamer to freezer text.
BR, Timo
We have here in Finland word "krymppaus".It means that gunsmith makes choke to rifle barrels muzzle.
Have you made this and if you have I am interested to hear your results.
To our old gunsmiths it was normal work,but to younger I think it is too "dirty" job-
.Old smiths has little differences their own measurements/working methods and depends little of barrel steel,but basic was/is like this:
They run in lathe barrel muzzle outside diameter to about 0,59 " thickness, 0,75-1,0 " lenght.
Made bushing about 0,0012-0,002 smaller inside than 0,59".
Put barrel to deep freezer and heat this bushing 250-300 degrees C or over and put bushing to barrel muzzle.
I think you use word "washed out" and it is/was problem especially with hammer forget barrels.
But many times this method made also with cut rifling and button rifled barrels to better accuracy.
This came my mind when I read your reamer to freezer text.
BR, Timo