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Thread: my best guess
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June 22nd, 2016, 05:38 PM #1Senior Member
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my best guess
Cleaning around my bench I found 29 pieces of brass -9mm- that got pushed behind something else. I checked them on a wilson gauge and they all said OK. I reloaded them and rechecked them and 7 of them had no intention of head spacing OK. My best guess would be the brass bulged out during the pressing stage. I only saw one that looked bulged by the rim. What do you think?
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June 23rd, 2016, 01:38 AM #2
Re: my best guess
??? I think I'll give up and go to bed.
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June 23rd, 2016, 08:52 AM #3Senior Member
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Re: my best guess
How are you crimping them? If you are crimping with the seating die make sure it's not trying to crimp before the bullet is fully seated.
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June 23rd, 2016, 09:31 AM #4Grand Member
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June 26th, 2016, 06:25 PM #5Super Member
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Re: my best guess
I used to have trouble w them pesky 9mm cases..until I bought a 'undersized 9mm resizing die online'..I 4got where I bought it, but it draws'em down a tiny bit smaller than a std 9mm die and seems to resize down closer to that extractor groove..where I USED to get small bulges in some cases. I'm retired and have more time, so I mic every 9mm case after resizing to make sure it is within a couple 1000ths of an average of 10 factory cases AT the groove. Since I have been doing these things I have reloaded a couple 1000 9mm mixed cases w/o much trouble..other than tossing out a FEW which were out of acceptable diameter at the groove. No problemo w head spacing since that. ;-)
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