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rhuff · 09-16-2015, 05:05 PM

Can you measure the shoulder to base length on each piece of brass. If I read the OP correctly, you were given the NW brass and have no idea what chamber(as to it specs) this brass was fired in. If the NW brass was fired in a very "generous/out of spec" chamber, the fire forming of the shoulder could be causing you a problem.

I own/use an RCBS 30 Luger sizing die, but my die would not set the shoulder back far enough to give me the headspacing that I wanted/needed in some of my 30 luger handguns.

I chucked the sizing die up into a lathe and removed .015-.017in. off of the base of the die. Added a small radius to the inside edge of the base. This "tuning" was enough to get the shoulder of the 30 luger brass(I load many different manufacturers brands of 30 luger brass) to set back to allow 100% chambering in all of my 30 luger barrels.

I have zero experience with your NW brass, and have never even seen a piece of it, so I am sort of walking blind here.

09-16-2015, 05:05 PM	#8
rhuff Patron LugerForum Patron Join Date: Mar 2011 Location: Az. Posts: 2,308 Thanks: 2,737 Thanked 993 Times in 729 Posts	Can you measure the shoulder to base length on each piece of brass. If I read the OP correctly, you were given the NW brass and have no idea what chamber(as to it specs) this brass was fired in. If the NW brass was fired in a very "generous/out of spec" chamber, the fire forming of the shoulder could be causing you a problem. I own/use an RCBS 30 Luger sizing die, but my die would not set the shoulder back far enough to give me the headspacing that I wanted/needed in some of my 30 luger handguns. I chucked the sizing die up into a lathe and removed .015-.017in. off of the base of the die. Added a small radius to the inside edge of the base. This "tuning" was enough to get the shoulder of the 30 luger brass(I load many different manufacturers brands of 30 luger brass) to set back to allow 100% chambering in all of my 30 luger barrels. I have zero experience with your NW brass, and have never even seen a piece of it, so I am sort of walking blind here.