Ive had a few bad experiences with Brennekke slugs. I will never use them again. I jsut shot up the rest of mine to get rid of them. I shot 5 different deer with them at ranges from 10 to 60 yards and none of the slugs enterd the deer. You would hear them hit but woudlnt penetrate the skin. I shot 5 of them at a 2x4 at about 50 yards. The slug would just leave a dent in the board and flatten out and fall on the ground. Every shot i went a picked up a still hot slug that did not go through the skinny part of a 2x4 at 50 yards. They group well but i would never hunt with them again.