Hello Folks,

After pondering the relative effectiveness of the Rigby-style muzzleloading rifle Steve Zihn built for me, I decided to compare the
Taylor Knock Out index (TKO) to some cartridge guns. To give some idea of the magnitude involved, here is a photo of the ball next
to a round of 454 Casull ammunition. The ball is perched atop a 45 Colt case.

TKO was proposed by John “Pondoro” Taylor as an index of killing power on large, dangerous game. It is calculated as the product of
projectile mass (in lbs), speed (fps), and diameter (inches).

TKO = (grains * muzzle velocity * diameter) / 7000
TKO muzzleloader = (430 * 1800 * 0.665) /7000 = 73.5
TKO 458 magnum = (500 * 2250 * 0.458) / 7000 = 73.6

Recoil is comparable too. It looks like the gun is up to any job I put it to.

Take care, Tom