Originally Posted by Chas1
J E Custom, what do you mean by the shoulder was cut back? Do you mean cut back on the barrel as in past where the normal barrel threads stop?
When your chamber and throat gets worn or is not very good it is sometimes best to
cut the chamber deeper to true it up and clean the throat to improve the accuracy.
It is common to do this and when anything is removed from the chamber the shoulder
of the barrel has to be set back the same amount in order to maintain the head space.
Some material has to be removed from the tenon also.(The threaded part of the barrel).
Most factory rifles cut there threads using a thread mill and the threads go almost to
the shoulder on the barrel even though they are not used buy the action .
And buy using a thicker recoil lug if you surface grind it to the proper thickness then the
head space can be set to SAMMI spec. and the barrel caliber ID can be placed back in the
original location ,other wise it would end up under the stock and you would have to
get it re engraved or stamped in the proper location.
I find this one of the easy ways to freshen up a chamber after excessive shooting.
The only downside to the thicker recoil lug is that the stock has to be re inleted to
except the thicker lug.
J E CUSTOM