Drew,

Nice rifle, and nice post! I'm having similar good luck with my Boddington Series .450/.400. Really like both the rifle and the cartridge.

I'm curious about the powder you use. What is the US equivalent of AR2213SC? I'm using H4831SC and 400gr Woodleighs, and have gotten the following velocities thus far:

80gr 1947 fps
82gr 1991 fps
84gr 2033 fps
86gr 2064 fps

At 50 yards, it shoots little clusters(with 3x Leupold). Haven't shot it past that yet. Bullets hit right at the top of the bead.

Also having some positive results with Trail Boss powder, and Hornady 300gr (.411") bullets, for practice. Velocity is about 1500 fps, virtually no recoil, and hits within a couple inches of the 400gr bullets.

Jeff