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Nosler Custom Brass.

 
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  #8  
Old 03-28-2008, 07:24 PM
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Hmmmmm, so there are several manufacturers of Nosler brass. That's a real bummer...

I bought 50 rounds of the stuff in 300 RUM to resize to 270 AM. The loads I put in them were not hot by any means in the Remmy cases. There was also no pressure signs with the Noslers such as extraction etc.

However, when I reloaded them the primer seating pressure was really reduces. After the next firing the pockets were more loose.

I never had to push the should back or trim but the case heads just didn't cut the mustard.

That is, was, and will be my only experience.
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  #9  
Old 03-28-2008, 10:38 PM
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Magnum---going from 74 grains with no pressure to 75 with blowing primers seems really strange. I would think it would take about 3 grains to make a swing like that. BUT, I had a "like incident" happen with my 30-378 a while back. I was working with max loads and everything seemed fine. I was really happy with velocity and no marks on the brass and all of sudden.....with the same batch of brass...same everything an ejector mark showed up....then another....then a sticky bolt. All I could figure is that the barrel had hit the max on copper and powder fowling and that bullet was really "not wanting" to go down the barrel causing excessive pressure. Velocity had gradully increased about 50 fps on those 3 extra bullets.
There are guys out there that try to say that a chrono has "no useful" purpose in load develpement....but personally I think they are so good that they should have a voice feature that says...."things are changing"....."things are really changing"...."look out dumbass I warned you"! Well......maybe that would be annoying......!
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  #10  
Old 03-28-2008, 11:36 PM
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I had a bad experiance with the Nosler .308 brass when switching from win brass. I dropped a grain below sierras accuracy load of 42.7gr RL 15 with a 168 sierra and blew a primer even though it was about 2 grains lower than my win brass load. I dropped down 2 more grains and the load was still hot. If I remember right I went to 38 grains with nosler brass. It shoots great now but I am thinking it is below the sierra listed loads.
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  #11  
Old 03-29-2008, 09:12 AM
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Thanks for the warning on the 308--when I get into that batch of nosler I better start at least 3 grains lower. Just weighed virgin nosler (176 gr) against virg win (156gr). Now weight doesn't ALWAYS mean alot less case capacity but if you are a betting person you would swing to that idea. I had bought some graffs 308 brass and it was heavy and it took about 1.5 grains less to make the same velocity as win.
When looking at case capacity I used to fill them with water but I found it a bit messy so I now top them off with a ball powder and compare the wts as a percentage.
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  #12  
Old 03-30-2008, 06:05 PM
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Check the neck thickness. It is really way off on some of the 308 cases. If you have a Lee Neck Sizer Die you will really notice it when you start paying attention. About one in ten is really bad.
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Old 03-30-2008, 07:39 PM
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Best way to check neck wall thickness variations??

So what is the best tool?? I'm thinking a ball micrometer?? And I'm thinking that virgin brass should be run over a mandrel and chamfered inside and out to make using the mic a bit easier?? Tell me your methods please.
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  #14  
Old 03-31-2008, 10:22 AM
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If you have a RCBS runout gauge you can measure neck thickness with it. If you don't have a runout gauge then that is a very good investment towards accuracy.

I haven't personally measured it, but I can feel it with the Lee die. I can also see it on paper at 800-1000yards.
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