I'm going to put a plug in for versapod. I recently bought an Atlas to use one first hand and make my own deductions. I have only had it a week, but I think it will be great for hunting rifles because it is so light. Guys are right about you have to deploy each leg one by one (could have sworn I've seen a vid showing how to do it with one hand, but I can't find it), and I don't like how the legs spin when loading it. I have to back off a bit with it. Still haven't used it enough to fully make up my mind on it.
I've been using versapods for about 7 or 8 years now. You can attach them to the rifle with one hand, and you can deploy them quickly with one hand. They will pan, and tilt and have enough play in them to be preloaded just like an Atlas. The more I read the reviews of pros and cons of Atlas vs Harris over the last year or 2, I can't help but think people should try out a versapod because I think they are a nice blend of both...just my 2 cents.