I applaud your move back to conicals. I made the same move myself a while back. While you are at it you might as well go back to straight BP as well.
And yes the Knight's shoot the conical very well. Look for an older MK-85. They will drill the conicals. And look for a musket cap conversion cap. I prefer that ignition to the 209 ignition. And there has never been a better trigger in a production MZ that was better than the trigger in the MK-85.
And one last thing. Don't give up on the 50 caliber. There are just as many good 50 caliber molds available as 45 caliber molds. And the 50's will do very well themselves. Tom.