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Old June 2, 2013, 04:23 PM   #1
Metal god
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Case length for AR

I'm getting ready to start reloading for my AR .I've never reloaded before so this is all new to me . Still waiting on back ordered bullets and powder . I have a couple thousand rounds of brass and started cleaning , sizing and swaging the primer pockets .

I have read and or was told that if I'm going to crimp I will want all my cases to be the same length . I believe this is so each crimp will be consistent to the next . I bought the lee manual case cutting tool for 223 . It cuts them very well and very consistent . the problem if there is one is it cuts them to 1.745 and my reloading book says cut the case to 1.750 . Is the cutter cutting the cases to small or will that length be fine . I have about 500 cases cleaned and sized . I stopped at 500 cus I'm not even sure if all of those are done correctly . I did the work per the instructions I'm assuming there fine . Just don't want to ruin all 2k all at once before I even reload one .

Anyways I started cutting them to length and stopped at about 20 cus they all are .005 less the what the Hornady book recommends . Is the 1.750 just a recommendation or is it the minimum length I should go .
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Last edited by Metal god; June 2, 2013 at 11:46 PM.
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Old June 2, 2013, 05:35 PM   #2
Ifishsum
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.005 shorter is no problem, load them up and shoot them. I once accidentally trimmed a batch more than .010 short myself, still worked fine. Good thing is that it should be that much longer before you have to trim them again
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Old June 3, 2013, 05:32 AM   #3
trobin
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I wouldn't even crimp the rounds if you have good neck tension.
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Old June 3, 2013, 07:06 AM   #4
Mohave-Tec
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Chamfer and deburr to take the edge off the case mouth. The case will likely be 'book' length after you fire it again.
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Old June 4, 2013, 05:39 AM   #5
trobin
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I double checked my cases I have prepped and ready to load. They are at 1.733-1.739. They all hold primers, powder, and projectiles.
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