40 S&W vs 10mm auto Battle of the 10MMs!

Today we have 40 Smith and Wesson vs the 10mm Auto! While technically both are 10mm, the .40 is a cut down, lower powered version of the original 10mm. We'll see how they compare in wood, concrete, and steel and if the 10mm is really the monster that it's claimed to be. In addition we'll test off the shelf 10mm vs 10mm Underwood ammo to see if there's really a difference in 10mm ammo itself! Everything is 180 grain flat nosed, full metal jacket.