Maximum Penetration for the Most Critical Moments. When you are deep in the backcountry, you need a round that treats the .357 Magnum with the respect it deserves. The DoubleTap Hunter 200gr Hard Cast Firearm Ammunition is engineered specifically for defense against large, dangerous game. While standard hollow points may expand too quickly and fail to reach vitals on a large animal, this 200-grain heavyweight is designed to punch through thick hide and heavy bone without deforming. It is the ultimate insurance policy for your sidearm when you are in big-game country.