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Old 08-07-2009 | 12:22 PM
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lemoyne
Giant Nontypical
 
Joined: Nov 2005
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Default The ballistic coefficient

I have seen and heard comments from time to time like
"it really doesn't make much difference"
so less just take a look at the difference.
With a SW250 gr bullet at the velocity recommended for the Omega Nikon scope as a starting point.
Shock Wave with a calculated BC of .199 to .2 at my sea level and conditions and a XTP with a calculated BC of .150.
we will look for some answers.

SW 250 gr "0" at 100yds has 10 inches drop at 200 yds and 18 inches at 250 with 999 Foot pounds of energy left.

The XTP 250 gr "0" at 100yds has a drop of 12 inches at 200yds and 26 at 250 yds with 725 foot pounds of energy left.

To me the drop in energy is more important than the drop in elevation. There are several publications out that recommend a minimum of 800 foot pounds of energy for deer. to me that makes the blunt bullets marginal at 200 yds and that's with 120 gr of BH209 not to say anything of some of the weaker powders.
Most of us don't take 200+yd shots any way but there are a few that do and I have taken both deer and bear at 180 yds so I am kind of interested in the subject.

What do you think?
Assuming good enough accuracy?
I can hit the 250 yd 6 inch gong any time the wind is reasonable is that good enough? Lee
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