Really MM? 'Tain't the "factory load", it's the "security" part. I'm guessing they used a shotgun or handgun with which they need far more practice, as well as familiarity with bear anatomy. A bear isn't a porn star you know... and riding around in a pickup checking locked gates, doors, etc. isn't much of a qualification when it comes to accurately placing a bullet.
Black bears die as easily from a well placed bullet - factory loads in an appropriate firearm are plenty good enough - as anything else; maybe a little more slowly than some critters.
You think the security management would allow employees to use anything BUT a factory round? I wouldn't. Liabiity issues.
