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Old July 28, 2010, 01:51 PM   #1
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Short .223 cases

I have read several posts about cartridge length and have read that the SAAMI specs for a .223 is 1.740-1.760. I am trimming my cases to 1.750. When I size a short case it seems to lengthen about .004. I have lots of cases that are 1.745 or less. Does this mean these short cases (under 1.745) should not be used? If they can be used how does one automate bullet seating for that large a variatiion safely? Thanks
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Old July 28, 2010, 02:12 PM   #2
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It's ok to use them. Seating should not be an issue but crimping might.
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Old July 28, 2010, 03:01 PM   #3
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Use them. After some firing and full length sizing, they will "grow" and be within spec. LONGER cases is where you can run into problems. If the case neck is too long it can pinch the bullet when chambered, maybe causing excessive pressure.

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Old July 28, 2010, 04:30 PM   #4
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There's factory ammo that has cases shorter than that. Shoot them into length.
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