I have shot the 3-12 burris a few times. A buddy of mine has a herd of remmy xp-100's all with 3-12 burries scopes on them.If you're wanting absolute precision, you'll be dissatisfied with red dot sites-go with the conventional scope and turn it down until you get used to it or are shooting from rest.
I don't care about weight. Your talking to a guy that takes a 17# rifle deer hunting.I wouldn't choose either, I'd get a Green Laser...when properly set up they're more accurate than the Red Dot & faster target aquisition than a scope.
Not to mention WAY LIGHTER!!!