POLISHING THE CHAMBER
After the barrel is correctly head spaced, the chamber should be finely polished. This is done with the
lathe running at a high RPM.
Note - The barrel that is sticking out the back of the lathe should be centered with a collar that has set
screws to hold the barrel from starting to run out of center with the high RPM. Use a fine polishing cloth
on the end of a slotted rod.
Do not over polish, as this will change the dimensions of the chamber. You will be able to see all the
scratches, and will be able to measure any part of the chamber.
Screw the barrel on the action, seat it very tight, remove the extractor, and the cocking piece. Drop a
new loaded round into the chamber and close the bolt. It should close any pressure. Remove the loaded
round, and drop the No Go gauge in the chamber.
It should not allow the bolt to close. If for some reason it does, remeasure and face a little off the face of
the barrel.
FINISHING THE OUTSIDE OF THE BARREL
All that we have to do now is to polish the machine marks from the barrel and crown the muzzle. I find
that I can chuck the barrel in the lathe, using a live center and remove the machine marks with coarse
grit paper, then finish polishing with finer grit.
This does not take long if you have not left on the outside of the barrel. If there are chatter marks on the