For many years it was the 125gr 4bl head and the 115gr 4bl head before that, but have killed quite a few with the 125gr 4bl Phantom as well. Just had to change over to 100gr tips after a string change and speed increase on my bow and shooting the 100gr 4bl Phantom and standard Muzzy 100gr 4bl head. Took a bear last weekend with the Phantom and down and out in 8 secs falling DRT out of the tree. I do sharpen the trocar tip when I use the Muzzy heads and never had any problems with many deer, hogs, elk, bear, etc.