Abowyer x 6 years. I shoot their Wapiti head combined with a 75 gr steel adapter to equal 250 gr total head weight. I can get them 100% as sharp as any head I've ever used, and maybe sharper. Good edge retention and no evidence of dulling beyond what is normal for shooting through an animal. I have yet to bend any Abowyer head, or damage any ferrule. Excellent finish, near-perfect grind and a good strong tanto tip. I could choose any head I want but when I MUST have a super-performing head I go with my Abowyers. I don't think a better head exists at any price.