I like both the Harris and my atlas. Different beast but both work equally as well I find the atlas easier to set up on uneven ground but like the spring loaded legs on the Harris S 6to9 notched model.
But with most of my rifles set up with rails on the forearm I find the atlas easily moved from gun to gun. I have thought about adapting the Harris the same way. Just have not gotten around to it with the atlas doing just fine.
