by pitted bore » Fri Jul 08, 2011 8:01 am
Stealthshooter-
I'm unclear how much the boat tail contributes to ballistic performance. At the velocities that can be obtained with the smaller 45 cases, the few thousandths the boat tail may add to a BC value will make little practical difference in trajectory or remaining velocity. If the bullets were stuffed into the 460 Wby case, the boat tail might make a measurable difference.
Barnes' own pointed original 458 bullet #45701 300 Grain Semi-Spitzer with a Flat Base has a BC of 0.291, which is higher than their two Boat Tailed bullets.
(I wrote the above in a thread here last Oct, but it still applies.)
--Bob