Gunsmithing Cleaning external threads after cutting them

[LC 6.5 Shooter]

So Ive am new to doing my own barrels. Just finished my first one yesterday. Question I have is after cutting external receiver threads how do you clean them up. I use a file to knock off sharp top. Scotch brite pad. Do you ise anything to clean up the deepest part of grooves

 

[n2ishun]

Normally you don't have to.
*If* you have any burrs in there you can put it back on the lathe and use like 400'ish paper folded in half so both sides are grit and just let the lathe do the work.
Be gentle though and don't change the threads by over doing it.

 

[Hobo Hilton]

If your tool is right, there should be no clean up... While it is chucked up, should you see a burr, you might use a miniature file (like a thread file) or one a jeweler uses to clean up a nick.

 

[Alpine 338]

Texas Toothbrush (Stainless Steel Toothbrush)

 

[Steel head]

I file the tops if needed then grey scotch brite or craytex.

It doesn’t need it but I love pretty and super smooth threads.

 

[Praeger]

Looks like a nice first barrel. Don't obsess over mirror smooth thread surface finish. Most use a file to knock off or flatten the thread crest - makes it less vulnerable to damage and the flank does all the work.

 

[Davester]

I use a full thread form insert - never had to clean a thread yet