Actually, I was wondering about the viability of making a Crossbow wielding Archer Ranger. It seems this is not a good idea as I need to take a minor action each round to load the weapon which I often need for Hunters Quarry.
It costs a minor action, but where's the problem?
If someone is still your quarry, shoot 'em.
If someone isn't your quarry (for they are dead), just stand still, designate, and shoot.
Gets better once you have the Steady Shooter feat (p206) ... adds +3 to every damage roll ... so if you twin strike ...
If you really need a machinegun, Swiftshot Crossbow (AV p79) allows loading as a free action.
What's more, having to load a crossbow in combat is awesome fluff.
Just think of the imagery, scrambling to get more bolts off ... and the occasional bits of crazy as you use powers like Split the Tree.
Oh, and on the issue of damage, Superior Crossbow has +3 to hit ... hitroll > damroll.