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Rifles, Reloading, Optics, Equipment
Reloading
1st time pressure test
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<blockquote data-quote="ResearchinStuff" data-source="post: 1485492" data-attributes="member: 67843"><p>The chamber in my factory rem 700, 300 win mag is so long that I actually had to bump up the powder charge by 1.2 grains just to get back into the velocity node after the first firing and bumping the shoulder back .001". If you have an equally sloppy chamber there is literally no point in trying to find anything out with the first firing of the case, just run a known, safe load through the gun to stretch the cases out, then do your load work up with once fired cases. The other alternative is to have a new brass load and a once fired brass load, both giving you the same velocity. </p><p></p><p>Personally, I use the expander mandrel to make the case necks uniformly round, then turn the case necks, then use the bushing bump die to set neck tension. I'm not saying you're necessarily doing it wrong, just thought I'd point out that there's another way to use the tools you have.</p></blockquote><p></p>
[QUOTE="ResearchinStuff, post: 1485492, member: 67843"] The chamber in my factory rem 700, 300 win mag is so long that I actually had to bump up the powder charge by 1.2 grains just to get back into the velocity node after the first firing and bumping the shoulder back .001". If you have an equally sloppy chamber there is literally no point in trying to find anything out with the first firing of the case, just run a known, safe load through the gun to stretch the cases out, then do your load work up with once fired cases. The other alternative is to have a new brass load and a once fired brass load, both giving you the same velocity. Personally, I use the expander mandrel to make the case necks uniformly round, then turn the case necks, then use the bushing bump die to set neck tension. I'm not saying you're necessarily doing it wrong, just thought I'd point out that there's another way to use the tools you have. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
1st time pressure test
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