I finally shot some of the 200 grn. hard cast today. Not as much recoil as I expected. Not unpleasant recoil at all (the Colt Delta Elite does have some weight to it, so that probably helps a bit). Totally reliable in the Delta Elite as well, though I didn't shoot very many rounds.
It does smoke quite a bit (as Underwood says it will, due to the high pressures burning the lube wax the bullet is coated with). Didn't bother me at all. I actually thought it was kinda cool, like shooting old-school black powder rounds. Didn't smell bad or anything, just a big puff of smoke with each shot. Seemed accurate and controllable.
Overall, I'm pleased. I actually had my chronograph with me, but my buddy was using it with his rifle. Would have been interesting to check velocities. Maybe next time.