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12/2/2012 6:56:26 PM EDT
Here's the gear & components:

308 Win Hornaday 'new dimension' seater die, rockchucker press
155gr SMK


I'm getting upwards of .014 difference between seated OALs.  Doesn't matter what brand of brass or procedure of prep (full length vs neck sizing), all cases are trimmed, but not annealed beyond factory.  I'm not competition shooting so I'm ok with a few thousands variance, but fourteen-thousandths is getting ridiculous.

Anyone else have this happen?  I'd thought I'd run it by y'all before I called Sierra and/or Hornaday.
12/2/2012 6:59:47 PM EDT
[#1]
Measuring base to bullet tip will always give a pretty good OAL spread.  If you want to know what your true OAL/COAL is you need to measure off the Ogive and not the tip.
12/2/2012 7:25:50 PM EDT
[#2]
http://www.ar15.com/forums/t_6_42/384811_115_Berger_VLD_25_06_Rem_OAL_varies___________comments_.html




Happens all the time, as in this thread.




Same answers as to why.
12/2/2012 10:01:43 PM EDT
[#3]
Everything they said is true.  

The thing is, if you plan to load them into a magazine the LONGEST possible OAL still has to fit (with some room to spare) or you are likely facing a jam.  You have to figure out how long that longest one is going to be and make sure it's short enough to still fit in the magazine.
12/3/2012 4:51:00 AM EDT
[#4]
You may also want to check your case rims for dents. These are common with auto loaders and easy to miss with the calipers but hold the case up off of the shell holder which results in deeper and varying seat depths.
12/3/2012 7:09:37 AM EDT
[#5]
Thanks guys, great info :)
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