Case Neck Turning

[GSPKurt]

I got a 20th Century case neck lathe a few months ago. I am using it for 6.5 CM brass. My question is do i ever need to turn the necks a second time or am I good for the life of the brass?

 

[lightman]

I have found that the brass can flow and I have turned the case necks on my match ammo a second time. The tool didn't remove very much material but it did remove some. I've also run a primer pocket uniformer through the primer pocket for a second time after they were fired a few times and got fresh material. So brass does flow. This was with pretty hot loads so your experience may vary.

 

[243winxb]

A 2nd turn is needed after many reloads. But i dont bother. The power outside neck turners build heat in the brass while turning . Not a good thing, if you measure to .0001"

The 2nd turn seems to always remove more brass, when i did it.

Your title need to read "Outside neck Turning."

 

[GSPKurt]

Your title needs to read "Outside neck Turning."

Yes, I agree.

 

[JFrank]

Once turned I’m done.
And just to expand on this it’s because i spend a lot tuning brass and loads on the LR stuff, turning necks a second time adds an unnecessary layer of complexity I don’t need or know if it’s right but I trust what I see on paper.

 

[DM~]

Depends on the individual brass/load, sometimes yes, sometimes no...

DM

 

[The Glockodile]

Sometimes, after subsequent reloads - you accrue internal "donuts" which you can "externalize."

These can, to a limited extent, be trimmed off externally.

 

[Walkalong]

If it gets up to where the bullet is seated, yes.

 

[243winxb]

Sizing 1/2 of a 243 win case neck with a bushing die , avoids any possibility of contacting a donut. Helps accuracy also, for me.