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  #1  
Old 05-26-2015, 07:13 PM
Huntnlabs Huntnlabs is offline
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Default Ogive ?

I see bullets that a few manufacturers list a bullet and give an Ogive number of a certain bullet.
Examples;
.17 Caliber offerings.
· *16 grain FB, HP, 6s ogive (drawn from .22/.705" jackets)
· 22.5 grain FB, LT, 7s ogive (J4–.460 jacket)
· 26 grain FB, HP, 7s ogive (J4-.560 jacket)
· 26 grain RBT, HP, 7s ogive (J4-.560 jacket)
· 26.7 grain LT, FB, 7s ogive (J4-.560 jacket)
· 27.5 grain LT, FB, 7s ogive (J4-.560 jacket)
· 29 grain FB, HP, VLD (J4-.635 jacket)
· 32 grain RBT, HP, 7s ogive (J4-635 jacket)

How is this number found? What is it's meaning? How do I determine a bullet's Ogive number on bullets? What is the effect on a bullets performance?
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Old 05-26-2015, 09:44 PM
Chickenthief Chickenthief is offline
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The number refers to the distance in bullet diameters. Ie 6D is 6 diameters away and 7D, you get the pic!
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Old 05-26-2015, 10:10 PM
TinMan TinMan is offline
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There is a nice schematic and explanation on here for tangent and secant ogive.

http://bulletin.accurateshooter.com/2007/07/283/
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Old 05-27-2015, 04:09 AM
RareBear RareBear is offline
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Seems like a lot of the Hornady rifle bullets are secant ogive.
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  #5  
Old 05-27-2015, 07:49 AM
Huntnlabs Huntnlabs is offline
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Quote:
Originally Posted by TinMan View Post
There is a nice schematic and explanation on here for tangent and secant ogive.

http://bulletin.accurateshooter.com/2007/07/283/
Thanks for the information. That helps a lot.
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