No, the patern master people posts all of their results using 00 buck, Federal to be specific. I found out about it when my friend got a new Beneli and put one one his shotgun. His shoots a great pattern but not as good as mine. This was the third deer season I have used it and I am still very happy with it. In 2001 I killed a 148 class eight pointer at about 75 yards. I would not have shot at this deer but I was able to get it to stop by grunting at him and with one shot he dropped after going about 50 yards.