Wish I could help but I can't just thought I'd let you know that you're not the only one. I tried the Grizzlies and the single bevel No Mercys and have thrown them in the trash and gone back to pre sharpened. I just can't take the chance of shooting an animal with a semi sharp BH. I've just come to the realization that I can't sharpen BHs. Or maybe it's that what some people call sharp is not sharp in my mind. If a BH wont shave hair, I don't think it's sharp. I'll try again next summer/late fall, but I really don't see what I could do different as I've used a file as shown on here. I've tried a Lansky sharpener as someone else has suggested....all stones, strop...the whole bit. I give up for this year. Maybe next year. God Bless, Dave