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Rifles, Reloading, Optics, Equipment
Reloading
What first? Powder or seating depth?
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<blockquote data-quote="Fitch" data-source="post: 557899" data-attributes="member: 19372"><p>No problem. You were polite about it, so I figured if I stayed with data and dialog we'd figure it out. We did. </p><p> </p><p>Thanks for the suggestion about Norma Brass. I may give it a try. </p><p> </p><p>Edited to add:</p><p> </p><p>Thanks to your prodding I went back to the reloading bench and started fooling around. Found two things. </p><p> </p><p>First, the seating die wasn't set up quite right. The case holder wasn't firmly engaging the bottom of the die at the top of the stroke as is necessary to take the linkage out of the seating depth determinatin and leave it only to the seating stem in the die. I fixed that, reset the die and ran the 7mmMAG ammo I previously measured back through the die. The COAL is now the same.</p><p> </p><p>That's the good news.</p><p> </p><p>Better news, I measured the base to ogive distance on the 14 bullets I have left in the box of 150g TTSX bullets. They averaged 0.7949", call it 0.795". The extreme spread was 0.006" on just the bullets with the shortest being 0.792 and the longest being 0.798".</p><p> </p><p>Re-measuring the ammo after running it back through the reset seating die, I end up with the extreme spread on the cartridge base to ogive distance being 0.006 which is the same as the bullets in the box.</p><p> </p><p>With that as input, tomorrow I'll load some cartridges with the reset die but using bullets which measure within +/- 0.001" (I have 4 that fit that criteria) and see if the completed cartridge base to ogive dimension settles down. If it does, I'll know what caused the variation with the Barnes bullets in the 7mmMAG ammo. </p><p> </p><p>I need to do some additional investigation on the 150g SST in the .30-06 to see what might be causing the variation I measure there. When I do I'll put it in a different thread.</p><p> </p><p>To the original poster: I'd say figure out the powder charge first, then fine tune with jump unless it's a Berger bullet in which case I'd do as Berger recommends.</p><p> </p><p>Fitch</p></blockquote><p></p>
[QUOTE="Fitch, post: 557899, member: 19372"] No problem. You were polite about it, so I figured if I stayed with data and dialog we'd figure it out. We did. Thanks for the suggestion about Norma Brass. I may give it a try. Edited to add: Thanks to your prodding I went back to the reloading bench and started fooling around. Found two things. First, the seating die wasn't set up quite right. The case holder wasn't firmly engaging the bottom of the die at the top of the stroke as is necessary to take the linkage out of the seating depth determinatin and leave it only to the seating stem in the die. I fixed that, reset the die and ran the 7mmMAG ammo I previously measured back through the die. The COAL is now the same. That's the good news. Better news, I measured the base to ogive distance on the 14 bullets I have left in the box of 150g TTSX bullets. They averaged 0.7949", call it 0.795". The extreme spread was 0.006" on just the bullets with the shortest being 0.792 and the longest being 0.798". Re-measuring the ammo after running it back through the reset seating die, I end up with the extreme spread on the cartridge base to ogive distance being 0.006 which is the same as the bullets in the box. With that as input, tomorrow I'll load some cartridges with the reset die but using bullets which measure within +/- 0.001" (I have 4 that fit that criteria) and see if the completed cartridge base to ogive dimension settles down. If it does, I'll know what caused the variation with the Barnes bullets in the 7mmMAG ammo. I need to do some additional investigation on the 150g SST in the .30-06 to see what might be causing the variation I measure there. When I do I'll put it in a different thread. To the original poster: I'd say figure out the powder charge first, then fine tune with jump unless it's a Berger bullet in which case I'd do as Berger recommends. Fitch [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What first? Powder or seating depth?
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