I started using Bear Razorheads around 1965 or so. Even though I mostly use Magnus heads nowadays, I still have a couple dozen Razorheads on hand. They're the best flying, most accurate fixed blade heads I've ever used. They were all I'd use for the old "animal shoot" broadhead tournaments. Yes, we really did shoot broadheads in tournaments, once upon a time.
Like JimBow said, the steel (17-4PH stainless, last I heard) is pretty soft and gummy. It takes a light touch with a 6" mill bastard file to get a good cutting edge on 'em. They will not take a smooth, polished, honed edge. At least, such an edge is beyond my skill and I'm pretty good at sharpening stuff.
Just make sure your arrows will handle the extra 20 grains.
Come to think of it, though... Some years back, Bear was marketing some replaceable blade heads under it's banner. If those are what you've got, then be careful. I never was very impressed with their replaceable blade heads.