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Thornily and TKO Calculations

1556 Views 4 Replies 5 Participants Last post by  MikeG
When running these calculations on the beartooth ballistics page, should we be entering anticipated expanded diameters of bullets after impact? For example; if I enter .308 for a 180g 30/06, the calculation for Thornily show it to be barely an adaquate deer load, but enter .450 as that bullet's diameter after impact and it's back to being an Elk load. What's the rule?
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Both of those calculations are based upon the bullets original nominal diameter... admittedly both are somewhat skewed towards the bigger bores. In any case, they are nothing more than a yardstick by which to compare one bullet/cartridge to another with a relative quantitative correlation.

I suppose that by inserting the anticipated expanded diameter of a given projectile you could also generate a useful comparison as well, however, you'd also have to calculate the impact velocity for it to have any relevance.

Hope this helps.

God Bless,
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