do a little test. BE CAREFUL!! Put an old arrow in a vise pointing straight up. Screw in your favorite 3 or 4 blade. Take a stack of rags, place them on the broadhead and pull down on the rags. See how much pressure it takes to go through, if it goes through. Now, take a hand sharpened 2 blade, manufacturer doesn't matter as long as it's a cut on contact blade. Now, place the rags over it and pull down, but be careful, it will take less than 1/2 the amount of force to pass through the rags! If more people understood cut on contact blades, you'd see less wounded and lost deer every year. Broadhead manufacturers have done a very good job getting hunters to buy into replaceable heads instead of heads that are able to be resharpened, and penetrate better.