How to polish a forcing cone?

[Caballero59]

I've cut my forcing cone to 11 deg but even though I went slow with cutting oil, there are some machine marks. How does one polish this?
Thanks

 

[hittman]

Moved to gunsmithing section

 

[BoggusDeal]

I use a Brownell’s brass lap.

 

[Caballero59]

I use a Brownell’s brass lap.

I'll check that out, thanks

 

[BoggusDeal]

This is part of a kit.

https://www.brownells.com/tools-cleaning/bore-barrel-tools/bore-lapping/brass-laps/

 

[Caballero59]

This is part of a kit.

https://www.brownells.com/tools-cleaning/bore-barrel-tools/bore-lapping/brass-laps/

Thanks. Do you think that will work with the rod and handle used to cut the 11 deg forcing cone?

 

[BoggusDeal]

Yes, sir, it will.

 

[neilin]

I've cut my forcing cone to 11 deg but even though I went slow with cutting oil, there are some machine marks. How does one polish this?
Thanks

Emery cloth, varying grits. Give your fingers plenty of rest during the process.

 

[contender]

The brass lap is the best option. Using different grits to smooth things up. Uniformity is a key thing here,, and the brass fitted lap is made for that.

 

[Caballero59]

The brass lap is the best option. Using different grits to smooth things up. Uniformity is a key thing here,, and the brass fitted lap is made for that.

Exactly my thoughts.