I don't have the "Birdshead grip frame". I have an origional Single Six in .32mag. My pet load is a 90gr truncated cone over 4gr Unique and a small pistol primer. Shoots a single ragged hole from me holding off a sandbag at 25 yards. Great gun. I'll never trade it. Great for target / plinking, woodchucks, fox, squirrel and the occasional racoon.