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Rifles, Reloading, Optics, Equipment
7mm STW
Peterson Brass Belted Mag Basic Unprimed Box of 50
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<blockquote data-quote="josh_127" data-source="post: 3037913" data-attributes="member: 119169"><p>Made 10 cases today. First fired with 180 gr mk and a mild charge (65 grains) of data 86 powder...same as accurate 3100...my go to powder for breaking in magnums as the flame temp is so cool but burn rate is close to h1000...just really temp sensitive. Interesting thing happened in that the cases grew longer...like all the way to the end of chamber neck...and the shoulder pushed back .003... scratching my head on this one as its opposite of what I thought would happen. Necks stayed the same thickness...only thing I can think of is my shoulder gauge is reading off a false shoulder from the neck down procedure and I set the shoulders pretty far back instead of .002 from headspace...anyway with the Neil Jones die it took me about 15 minutes to make 10 cases with a amp annealer and my Frankford arsenal case prep center. I'm going to do another fire forming charge to get the shoulders where they need to be then I'm gonna run on these with n570 and Berger 195's and see if it'll go higher than my nosler brass...with nosler brass I was getting 3130fps @81.7 grns...pressure signs @82 grns...28" bartlein barrel. We shall see if the Peterson brass will top it...my goal is to get to 3150+...I know some guys are getting there with 28 nosler and adg brass.</p></blockquote><p></p>
[QUOTE="josh_127, post: 3037913, member: 119169"] Made 10 cases today. First fired with 180 gr mk and a mild charge (65 grains) of data 86 powder...same as accurate 3100...my go to powder for breaking in magnums as the flame temp is so cool but burn rate is close to h1000...just really temp sensitive. Interesting thing happened in that the cases grew longer...like all the way to the end of chamber neck...and the shoulder pushed back .003... scratching my head on this one as its opposite of what I thought would happen. Necks stayed the same thickness...only thing I can think of is my shoulder gauge is reading off a false shoulder from the neck down procedure and I set the shoulders pretty far back instead of .002 from headspace...anyway with the Neil Jones die it took me about 15 minutes to make 10 cases with a amp annealer and my Frankford arsenal case prep center. I'm going to do another fire forming charge to get the shoulders where they need to be then I'm gonna run on these with n570 and Berger 195's and see if it'll go higher than my nosler brass...with nosler brass I was getting 3130fps @81.7 grns...pressure signs @82 grns...28" bartlein barrel. We shall see if the Peterson brass will top it...my goal is to get to 3150+...I know some guys are getting there with 28 nosler and adg brass. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
Peterson Brass Belted Mag Basic Unprimed Box of 50
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