[1Old Pro]

The bear was apparently stunned, because it had left the area by the time rangers examined the scene. one shot just stunned the bear?

[Tijeras_Slim]

John “Pondoro” Taylor designed a system of measuring big game rifles effectiveness based on a “Knock Out Value” of what it would take to incapacitate an animal such as an elephant.

Bullet weight in grains x bullet diameter (decimal inches) x velocity (FPS) / 7000 = KOV

That said, a KOV of 12 for a 158 grain bullet at 1400 FPS is pretty feeble for a grizzly.

This dude was lucky.