I enjoyed going back through this thread. Get that old beast bedded properly, with the spacer, some nice epoxy bedding, and start dropping them.
One thing I'd think about is the HDY 150 SP with cannelure. I shoot those over Varget or 4895 (depending on what I have "too much" of) in a Yugo P44 and get 1 and 1/4 groups for 5 at 100 with a cheap "scout" scope and a five-dollar Paragon take off Nazi barrel. I only have shot one coyote with it, but it was DRT with plenty of zap left over.
