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Old March 2, 2013, 12:01 PM   #37
Mike Irwin
Join Date: April 13, 2000
Location: Northern Virginia
Posts: 39,175
Whoops, made an error in the above...

I said Ballistic Coefficient... that's wrong.

I should have said Sectional Density. Sectional density is the critical factor once the bullet hits the target.

As an example...

Hornady makes a 160-gr. soft point round nose in 6.5mm that is close to the old 6.5x54 military round. Not the same, though, as the jacket is thinner and it's designed to expand.

It has a sectional density of .328.

A commonly used .308 caliber bullet is Hornady's 150-gr. Interlock boattail soft point. That bullet has a sectional density of .226, a HUGE difference between it and the 6.5 bullet.
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