Honestly Leupolds online manuals leave soemthing to be desired and seem to be a catch all for makes, models, and reticles...
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Here is the general manual, it has all the info but it's for all of the models, so you have to hunt for what you're looking for.
http://www.leupold.com/wp-content/up...ual.pdf?91a9b8
Yes, the screws are to reset the 0 as well as change out BDC dials - Leupold makes different ones and you can call them with your bullet info / velocity / etc and they'll make a custom one for you to dial in elevation if you want.
Yep. But the SPR reticle is already calibrated for 5.56 and 7.62
Yes, it has rough calibrations (assuming that's a typo for the 5.56 of 550 twice...) but it's going to vary a bit.
As a general rule I prefer holdovers as well as opposed to dialing in the range, obviously it's fast to use a holdover but probably more accurate to use a dial or dope for your ammuniton and velocity at extended ranges. The SPR reticle itself isn't my favorite but for my use on an SBR it'll do.
Another question for those running the vx-r.
What mount?
I am thinking an LT111 (http://www.laruetactical.com/larue-t...qd-scope-mount) would go awesome with.
Rock it.