Yes - very close - if repeatable, that would be good enough for me. I agree with the restricted range of factory slugs. Their poor aerodynamic properties really hurt longer range performance.

I'd place the max range on deer/blackbear at 200 and 150 on moose or elk, given a good round ball load at around 1,850fps to 1,900fps.

I do understand your desire not to load, though, nice to pickup a box of ammo and go.