From Veral Smith,
"In my book, Jacketed Performance with Cast Bullets I have a chapter which will answer your questions fully, with a formula which calculates the wound diameter created by a flat nose at a given speed.
To be sure of maximum effective range, using my formula, which gives a relitive number to the 'displacement velocity' of tissue spray, which causes the wound by any bullet, if the wound is larger than the bullet.
I cannot do justice the the topic in this forum. You'll have to read my book, which you'll find listed in my catalog."
"My displacement velocity formula is:
Velocity times meplat width in thousandths of an inch, divided by 4. Ideal DV range for big game is 100 to 125, with 130 at the very max for fastest kills. At 100, wound diameter will average about 1 inch, at 125 it will be around 1 1/4 inch. If the wound diameter is 1 1/2 inch or larger in diameter the animal will normally run like it's tail is afire for 50 to 150 yards before expiring, though the shot is centered in the vitals. Yes even with a 4 inch diameter exit wound on a deer. Many will drop instantly with large wounds, if nerve shock anchors them, but many will run violently because blood flow is slowed by too large a wound."
"You can measure the meplat of the bullet you are planning to use and calculate the DV for yourself. Bullet shape and design aren't factors, as the flat causes a spray of tissue which doesn't touch the sides of the bullet, and this spray is what makes the wound, whether the bullet is an expanding type or non-expanding. i.e. A SWC shoulder never gets wet during penetration unless it nearly stops in the animal."
http://www.gboreloaded.com/forums/index.php/topic,101081.msg1098270914.html#msg1098270914 That would give the Ranch Dog bullet with a velocity of 2000fps, a DV number of 112.5.
Right in the zone.............
(I don't sell RD bullets, just using that example.)
