You can run them out to about 300 fairly easy, but yes they do very well for close in work as well. Personally I would opt for an XPS solely based on the side mounted battery which doesn't beat the battery contacts the way the 512 does with them mounted in line with recoil. They have since updated the contacts to a heavier one, but a few years ago I never had a 512 in class make it an entire weekend class before it would go out do to the contacts getting broken under repeated recoil.Excuse my ignorance but I know nothing about these sights. So, the 512 has no magnification at all ? That would make it for close range only ? It's just for quick target acquisition ?