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Neck turning issues

 
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  #8  
Old 11-07-2012, 01:28 PM
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Location: NC, oceanfront
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Re: Neck turning issues

If you measure neck wall thickness, then you should know what it is.
You said some necks come out .268, some .264, and some .2705.
That means nothing.
What are the thicknesses coming out like?
Or, when you seat bullets into these necks, what are the loaded OD measurements?

Whenever turning you need a matching system. That is turner, cutter blade, turner mandrel and matching neck expander. I don't know if Sinclair's expander will result in proper fit to a Forster turner mandrel after a neck is expanded & sprung back. It might.
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  #9  
Old 11-07-2012, 03:19 PM
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Re: Neck turning issues

I have te thickness written down I'll check Friday when I get home. Necks are 2705 loaded on the rounds that I turn down to 269 and size with a 268 bushing.

These are just the "good" ones. About six out of seven. Then there's those that turn down to 265 when I turn them.
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  #10  
Old 11-07-2012, 03:56 PM
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Re: Neck turning issues

I used to use the oversized expander, but not anymore. I polish the mandrel down to where it's about a half thousandth to a thousandth under the neck ID. Then I run the cases thru a full length die again just to be sure. I use powdered graphite for a neck lube in the I'D. But before I cut the first shaving, I sort the cases. You may find some neck O.D.'s that are undersized and yet some that are somewhat oversized for what ever your looking for. Ideally you want to shave a max of about .004" to .005" total, but dosn't always work that way. If I have to remove more that six thousandths, I like to make it in two cuts (just works best for me) as I seem to get a better finish on the brass. I also like to leave about three to four tenths on the neck O.D. to polish off with a Scotch Brite pad. Lastly, for a finish cut I prefer to do it the hard way; by hand. I will rough the necks with a B&D electric screw driver
gary
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