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Posted: 5/7/2010 5:57:26 PM EDT
| I have some lapua 308 brass that is once fired and necked sized that length ranges from 2.005 to 2.010. Should i trim or just load them? What should I do? Thanks guys |
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Quoted:
When I want all my rounds to be in one hole, all my cases are trimmed to the same length. .002 above minimum. I never shoot any rifle round at max case length. Isn't max length 2.015? How much of a differance would a few thousands make? I am thinking of trimming them to 2.008" and keeping the 2.005 to 2.008. Would that be ok? Could I use the same amount of powder for all the cases even though they are differant length? Thanks |
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Five thousandths. Presumably in the neck.
Load all the cartridges to the same COAL and shoot them. Or trim them to the same length. Don't worry about the difference in pressure for this difference in cases; this stuff we're doing is simply not that sensitive to these tiny differences. Think about this for just a second. The dimensional difference you have does not affect the internal volume of the case below the neck. |
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Quoted:
Five thousandths. Presumably in the neck. Load all the cartridges to the same COAL and shoot them. Or trim them to the same length. Don't worry about the difference in pressure for this difference in cases; this stuff we're doing is simply not that sensitive to these tiny differences. Think about this for just a second. The dimensional difference you have does not affect the internal volume of the case below the neck. Thanks AeroE. I'm just nervous. When I started reloading I was told everything had to be exact. |
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Quoted:
Quoted:
Five thousandths. Presumably in the neck. Load all the cartridges to the same COAL and shoot them. Or trim them to the same length. Don't worry about the difference in pressure for this difference in cases; this stuff we're doing is simply not that sensitive to these tiny differences. Think about this for just a second. The dimensional difference you have does not affect the internal volume of the case below the neck. Thanks AeroE. I'm just nervous. When I started reloading I was told everything had to be exact. It's much better to be nervous and ask questions than to just pile in and do something the rest of us would think is crazy. In this case, the key is the effect on internal case volume, that is what we need to worry about. When you neck sized these cases, it's possible you changed the headspace slightly, and that is easy enough to measure, but I doubt the Lapua cases moved if you used good lube. The difference in length is most likely all in the necks, so the internal volume isn't affected at all, and the difference in neck tension between cases is probably not measurable. [Don't get cavalier about seating bullets in straight wall handgun cases just any old depth. The internal volume changes quickly in this situation. But, it's another topic from the one you're dealing with right now.] |
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