If you do not mind me asking here, how do you like the CZ 550? One of my customers is intrested in one and I have never seen the 550 in the Rigby.

Go with the rifles and try the 45/70 at 500+ yards. I built a 45/70 for a guy who shot those distances at steel deer, you know the game. He said you shot, got up, got a cup of coffee, then went back to the spoting scope and watched the bullet hit. He was kidding alittle but man could he shoot with that old cartridge, and with open sights. Spirit front sight and Tang rear. He puts alot of the scope guys around here to shame. It was neat to watch him shoot.