I practice regularly out to 40 yards, but that's to help my form more than anything. That being said, I've killed a few animals at 30 yards because out here where it's open, ranges can be deceiving. When the shot feels right and you drill the animal, then you later pace it off to 30 yards, it can be a shock. But that doesn't mean I'm content with that range. I just thought it was closer. That was for antelope, and the moose I shot.
As far as bow weight, I know a lot of guys shoot lower poundage (under 50#) but I'm not confident going lower. And that is what it's about, is confidence. I shoot 55# or more at 29". 680 grain or more arrow, and a sharp broadhead. YMMV