Leaning against a fencepost has always made good sense to me, if it's a large wood one, and the barbed wire is fastened on the other side.
I've posted several times on this subject of optimum velocity for fastest kills, and am in fact the person who discovered the fact and presented a formula to the world. That back in 1980. No one to date has told me the formula does not work or is not accurate. I'll add to your title to make the subject a bit more clear for future readers.
It is for solid non expanding flat nosed bullets, of any composition, but primarily of interest to cast shooters. Caliber is not a factor. Only meplat diameter. Weight isn't critical except to understand that the DV will hold up out to longer ranges and with deeper pentration as bullet weight goes up. But for bullet casters, most weights which shoot accurately are just fine for deer hogs and bear, which are the bread and butter big game in the states. To learn more details, get my book, Jacketed Performance with Cast Bullets, available from LBTMoulds.com or email me at LBTisAccuracy.net. More questions here won't hurt either!
Divide Meplat diameter, measured in thousandths of an inch, by 4. Use the answer to calculate Displacement Velocity at any speed for that bullet. Just multiply the above answer by the bullet velocity in feet per second, and don't worry about what down range velocity will be. Muzzle velocity seems to be fine, as range is normally fairly short for flatnosed bullets. I call it the DV formula, which is a relitive number for the displacement velocity of tissue which is liquified by the bullets meplat.
Optimum DV is 100 to not more than 135. Higher will result in slower kills. DV can be as low as 50 to 70 but wound diameter will be a half inch or slightly over through vitals and precise shot placement through the heart of major organs will be necessary for quick kills. From 80 through 90 and shot placement isn't quite a critical. Shot placement is always important, but with optimum DV, isn't as critical.
