Hi, Zak I am just getting into rifle shooting. I am very proficient with pistols, and qual'ed with M16/M4 in the service, but couldn't pass up an offer that was too good to be true for a Remington 700 ss 5R milspec. So, my question is this. I don't have a "tactical" scope, just a Leupold Rifleman 3-9x40, which is good for the range at which I shoot (150ish yards, maybe a bit further). How far out will this scope be effective before I have to drop major buckage for a better mil-dot scope? Thanks.