30 BR neck turning issues

[the long shot]

30 BR necking up problems.

Last season I could not figure out why my turner was biting so much into the shoulder when I turned my brass down after necking it up. I used the technique of a spacer on the neck and using the neck sizer to straighten the neck before turning but the problem persisted to bug me of why it was becoming crooked. I figured out the issue. I have a one pass 6 mm to 30 cal mandrel in a K&M mandrel holder mounted on my Rock Chucker and out of curiosity I raised the ram up to the mandrel without a case in it and found the mandrel sat crooked in the K&M holder.

By not tightening down the mandrel holder I was able to let the mandrel right itself while necking up the cartridge. Has anyone else run into a similar issue? Should I send in for another K&M mandrel holder?

Additional note... Despite warnings not to from some of my competitors, I have switched over to a power drill to turn my cases "slowly" when I turn my necks. My hands like it and wow do I cut down on time.

I learned a trick though. Even though I lube up my turning mandrel with imperial wax, I use an upside down air can between turnings to cool the mandrel down to prevent heating up the cases too much.

Any thoughts on a better way of necking up the 6mmbrs? I thought about using a Sinclair Expander with 7 mm and then 30 cal mandrels in two stages?

 

[Judd]

[quote author=the long shot link]I learned a trick though. Even though I lube up my turning mandrel with imperial wax, I use an upside down air can between turnings to cool the mandrel down to prevent heating up the cases too much.
[/quote]

That is a good idea. No matter with wax or not you can get them hot enough that it will leave some of the brass on the pilot. Then you have to steel wool the pilot to allow a case to slide on. Don't ask me how I know . I was just ready to get finished I guess and got in to big of a hurry.

 

[AlNyhus]

On the necks I turn with power, I fill a plastic bowl with regular rubbing alchohol and drop the neck turner in it after removing the just turned case. The alchohol keeps the turner cool. Knock the shavings off with a toothbrush into the bowl before doing the next case. -Al

 

[ronsroom1]

Fill a plastic bowl with ice, and then cover it with seranwrap. Place cutter on wrap and the ice will keep it cool and DRY while you are changing cases.

 

[vtmarmot]

For my first effort at turning my 30 BR necks, I expanded with the K&M one-step expander using Imperial was on the inside of the necks. I also used a Lee holder and a power screwdriver with the K&M neck turner with Imperial on the mandrel. They came out OK and shoot fine, but I want a case holder that aligns better. I saw some awhile back that align on the primer pocket, but I can't find the URL now. I want to get some.

 

[CJ6]

Harts neck turner does this and it uses Redding shellholders.

 

[GSPV]

I do the ice thing by sitting the turner on ice in ziplock bag while I'm setting up between cases. Works great.