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Old April 9, 2013, 08:02 PM   #1
rebs
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223 using the same oal ?

If the best accuracy with a 55 grain Hornady soft point bullet is with an OAL of 2.200, then why not load all 55 grain bullets to that OAL ?
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Old April 9, 2013, 08:34 PM   #2
jepp2
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Quote:
If the best accuracy with a 55 grain Hornady soft point bullet is with an OAL of 2.200, then why not load all 55 grain bullets to that OAL ?
That hasn't been my experience. However if you are loading for an AR, your OAL can be limited by the magazine. Typically 2.200" is given to make sure it will fit, but I find that 2.260" will fit in any magazine I have. But you can certainly single load in an AR with a much longer length. And bolt actions are a different story entirely.
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Old April 10, 2013, 06:27 AM   #3
steve4102
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It's not the base-to-tip measurement that's important, it's base-to-Ogive that is important.
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Old April 10, 2013, 09:28 AM   #4
rebs
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Quote:
It's not the base-to-tip measurement that's important, it's base-to-Ogive that is important.
could you explain this and how to do it ?
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Old April 10, 2013, 09:41 AM   #5
Brian Pfleuger
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Different bullets have a different profile, different ogive length. The ogive is the part of the bullet that is full-caliber size, the first part to encounter the barrel.

The base (of the case, the head) to ogive measurement dictates how far the bullet is from the rifling. Two different bullets loaded to the same OAL can be dramatically different distances from the rifling. Two bullets loaded to the same ogive length will be the same distance from the rifling but might be different OAL.
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Old April 10, 2013, 05:28 PM   #6
steve4102
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The most common way to "do it" is with a Bullet Comparator.

http://www.youtube.com/watch?v=llvsEsaK8-M

Notice he is off as the distance off the lands is not .52 inches, but a more realistic .052.

Last edited by steve4102; April 10, 2013 at 05:40 PM.
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