dimples on shoulder of 260 brass

Derek01

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Minuteman
May 2, 2011
59
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WV
When full length resizing my Rem or Lapua 260 brass I sometimes get a dimple on the shoulder. Never seen this before on any other caliber. Could it be me? too much or little lube? the die? (Redding fl) Thanks
 
Re: dimples on shoulder of 260 brass

Thanks for your help. I ran out of RCBS spray and ended up picking up a can of Lyman's spray because the store didn't have RCBS. Got some RCBS spray and problem solved. Didn't realize there was so much difference between lubes
 
Re: dimples on shoulder of 260 brass

Another vote for Imperial. I originally bought the stuff for making .219 Donaldson cases out of 30-30 cases. Now I use it for all of my single stage stuff that needs sizing.
 
Re: dimples on shoulder of 260 brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: procovert45</div><div class="ubbcode-body">Too much lube</div></div>

I was always told you could never have to much....

I would agree though lube on the shoulder is likely what caused this. Basically the lube being a liquid is non-compressible so when it gets trapped against the shoulder inside your die the hydraulic pressure causes a dent
 
Re: dimples on shoulder of 260 brass

hornady one shot works great and I never have a dimple on the bshoulder, with the Lyman lube almost all the case have a little one. Imperial is a fantastic lube for small batches, it get very old after rubbing brass with fingers after a while.
 
Re: dimples on shoulder of 260 brass

Fenwick

I apply the imperial with my fingers, but lube the inside of the necks with a plastic/nylon bore brush and powdered graphite or moly. A quick 15 min in the tumbler with untreated corncob or walnut and theyre ready to go.

Paul