6mm BR neck turning

[280man]

Hey guys I need to turn the necks of once fired cases. I think I probably need to size them with a standard die not a bushing die. Right now they are a little loose on my turning mandrel. The neck tension is all over the place so I'm going to try to skim cut them to ensure they are consistent.

Has anyone done this before?

 

[Steve Blair]

Yes. The procedure I used was: [br]
Size with a bushing .001" under my usual size
Expand with the turning tool expander mandrel
Turn necks
Ultrasonic clean cases to remove lubricant
Load

 

[jlow]

I full length size them first with a standard die. The reason is if you only size them with a bushing die, the sizing will not go all the way down to the shoulders which would cause a problem when you turn the neck since the unsized area of the neck (next to the shoulders) will have a larger diameter and so will be cut more which would make your neck thinner in that area – that would be bad.

So FLR with regular die first, expand with the neck turner pilots so that they fit snug in the pilot of the neck turner, neck turn to get the consistency you want, then size down with the bushing die to get proper internal diameter and neck tension.

 

[DennisH]

Expand with the turning tool expander mandrel
Turn necks
Ultrasonic clean cases to remove lubricant
Load

I use a standard 6br FL die

then,

I do exactly what gator stated above. I do this with all my brass.

The neck tension is all over the place so I'm going to try to skim cut them to ensure they are consistent.

I turn until I see very few dark areas (low spots), If the necks are all shiney, I am cutting too much. I would say I avg app taking off .0005 to "maybe" .001 (1/2 thous to one thous). Most of the time I avg 1/2 thous.

Also, I have had a "few" pieces of brass "so" bad, I threw them away, maybe 5 pieces in all. About 1/3 of the neck was dull! All once fired, all calibers, and Lapua.

I swear my accuracy improved on all of my guns when I started doing the above. Pay attention to the inside of the necks as well! Concentricity of the bullet, trimming brass, and neck tension are three of the most important steps in my books! concentricity expecially on long bullets!

 

[280man]

Thanks guys that is what I thought I needed to do just wanted to make sure

 

[jasonf]

Remove the expander assembly from the FLS die also.