Since I've had both single and double action revolvers jam on me, I can tell you that NO gun is 100% reliable. I will say that you are pretty much guaranteed at least one shot with a revolver though which cannot be said with a semi.
As a hunter, I don't see much utility out of SAs for that purpose. Nothing is as versitile as a 44mag Blackhawk for tailoring your load to your intended game (but there are more powerful handguns to be sure). But, for sport shooting, the semi gets the nod.
The tool makes the task, as my father says.