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Various case lengths #5655218 03/17/15 07:58 PM
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4finger13 Offline OP
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I recently picked up quite a bit of 9mm range brass. After cleaning and resizing I found that the case lengths ranged anywhere from .738-.750. All of my manuals suggest trim size is .750

Should I trim down all the brass to the shortest one so I get a consistent crimp?

On another note I Googled my problem and came across a forum where people were saying that if you have to crimp your pistol brass then you have your dies set up wrong... any truth to this?

Re: Various case lengths [Re: 4finger13] #5655308 03/17/15 09:15 PM
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ChadTRG42 Offline
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I'm showing a .754" as max case length. So, you are under the max length. I would just load them up and go. I would never trim a 9mm case, ever. It's not worth it, and the cases are plentiful. Plus, the chamber will allow a little more than a .754" case length anyway. Just load them up and go. On the crimp, the 9mm round, as well as many other non-bottle neck cases head space on the case shoulder, so a crimp is normally not needed. If you do crimp, it will be a taper crimp, not a roll crimp. I would not crimp.


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Re: Various case lengths [Re: ChadTRG42] #5655352 03/17/15 09:40 PM
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PrimitiveHunter Offline
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Chad...check your PMs.


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Re: Various case lengths [Re: 4finger13] #5705168 04/17/15 07:35 PM
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wrknonit Offline
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Keep in mind that 9mm headspaces off the case mouth so be consistent as possible for best results. and i dont crimp 9

Last edited by wrknonit; 04/17/15 07:36 PM.

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