Buckeye. you aren't alone.
I can get them sharp, but not as sharp as I think they could be.
I can get any two blade to shave hair easily, but not these damned things. I have used file and stone and strop, I have used grinder, I have used drum sander, heck I even made a convex stone so I could work a better angle into the blades. I read and used everyones advice.
All I got were worn out broadheads. I am believing that the bunch I bought are not very well heat treated. It is very difficult to get the marks out of the front of the blades, while the rears just wear away, and yes, this is holding them flat, trying forward motions, trying rearward motions. I have basically resigned them to turkey and small game hunting.
As I said, I can get them fairly sharp, but nowhere near "scary, shaving, razor, surgical, or whatever the current buzzwords are" sharp.
I am not very pleased with that. They fly well. Probably are good heads. But since I can't get them sharp, I won't buy any more.
ChuckC