Originally Posted by Jinx-)
By the way, I talked to my smith and he recommend me wood dowel with fine grit sandpaper to finish shoulders in that chamber, so I I made wood dowel shaped like my chamber with 30 degree shoulders, and I used 320 grit sandpaper and I think he was right its getting better! He is an old-timer and retired, but I guess he build rifles for 40 years and knows something... Still far from perfection but that's how brass looks now:
maybe few more passes and I'll get rid of them rings...
Just a word of warning !!!! Be careful when polishing a chamber because it leads to out of round
and out of SAMMI specs.chambers that can cause extraction and concentricity problems.
I personally "NEVER" polish chambers. the reason is that I like the reamer finish if done correctly
because it eases the thrust on the bolt by having the proper finish allowing the case to grip the
chamber but still allows extraction with heavy loads.
With a good/sharp reamer the chamber will be the truest it can be if it is done right. and even
though your chamber looked terrible and you want to improve the finish be careful.
Polishing a chamber is not necessary but some smiths like to do it for there own reason and are
very careful so it is ok as long as it is not to cover up a poor chamber.
I would not polish yours any more than you already have.
Just MY opinion.
J E CUSTOM