Kingfisher
My cylinder gap is 004 and my cylinder throat measurement is 495

I'm still trying to get good velocities out of mine. I don't know what the hell the problem is but I'm going to figure it out.

I'm currently only getting mid 1700's with a max load of LilGun and the 350 gr. Sierra's. I tried H-4227 and it was even worse. I'm going to give H-110 a whirl this weekend and see what happens. I will say that the Sierra's shot real good with LilGun in my 500 though.