Inner neck treatment, do you do anything?

[Kelly Timoffee]

Doing some neck turning and have the same result always which I assume happens to everybody else when doing the same process.

The inner neck gets scored/abraded by the pilot for the neck turner.Cleaning it periodically doesn't change anything.

Does anybody feel this is an issue??

The brass has been SS cleaned, decapped , sized, tumbled(to remove lube) and now I am turning necks.

 

[dero338]

I use case lube on the mandrel and its fine
I clean after

 

[308BAR]

Your method of neck turning is causing galling. Use lube imperial sizing wax on the mandrels will prevent most of it. Little goes a long way. Use a Q tip to clean up the wax after.

 

[Eagleye]

Your method of neck turning is causing galling. Use lube imperial sizing wax on the mandrels will prevent most of it. Little goes a long way. Use a Q tip to clean up the wax after.

X2!! This has worked well for me over several decades. Dave.

 

[vviking]

All of the above ^ ... good advice.

Out of habit, I gently bevel the inside neck mouths with a Lyman 14 degree shallow angle reamer, followed by a burnish with 0000 steel wool wound onto an old bore brush. When chucked into the drill/driver ... makes quick work of this step.

The test .. is to pull a seated bullet, look for longditudinal marks gouged into the bullet's shank by roughness inside the case neck .
A smooth unmarked bullet that is only burnished by seating .. does shoot noticably better, .. IME. And more so, as the range extends to waaay out there.

 

[Kelly Timoffee]

I just tried some light oil, kept the pilot fairly lubricated, didn't eliminate it but did seem to help.

Another round in SS tumbler I would imagine will smooth things out some also.

 

[calgarycanada]

You can try polishing mandrel with automotive car compound/polish. I can give exact details of polish I use, it works great. I have polished collet spindles and many gun parts to mirror finish. That should stop scratches from mandrel.
Just tape the threaded part of mandrel, put it in drill, some compound on a cloth, spin drill while you hold cloth firm against the surface you wanna polish. Move cloth back and forth. In about a minute surface of mandrel should be like mirror and it won't scratch anything.
Try it and report back.

 

[308BAR]

I just tried some light oil, kept the pilot fairly lubricated, didn't eliminate it but did seem to help.

Another round in SS tumbler I would imagine will smooth things out some also.

Are you expanding the case mouth using the proper mandrel? are you lubing your mandrel when you are expanding the case neck before neck turning? Are you using the right sized pilot for neck turning?

 

[Kelly Timoffee]

All of the above.Well, below.

Are you expanding the case mouth using the proper mandrel? are you lubing your mandrel when you are expanding the case neck before neck turning? Are you using the right sized pilot for neck turning?