Here is what I have determine following this post. The question is how far will 6 power get you shooting a Deer? (Please correct me if this is wrong)

1. How big is the deer......Let us say a 9 inch kill zone.
2. How accurate am I set up to shoot......Let us say 2MOA

If I am in this situation 450 yards is where my scope and reticle has to discern a 9 inch target that may or may not blend in with the terrain.

If I have a better Rest and or am somehow able to shoot under 2 MOA my scope needs to clarify a 9 inch target at a further distance. Eventually I would need to consider my bullets maximum effective range for a 250 pound cervidae. (That is if the scope can discern target out to that range)

"Shoot low sheriff, I think he's riding a shetland!" B. Wills