About six months ago, I shot at several 55 gallon drums, I had sat out between 200 and 500 yards. My goal was just to hit the 12 inch paper plates I had taped to them. I'll say I'm good out to 440 with my rifles, 1/4 mile isn't bad. Thats without adjusting the windage and elevation though, although some of my hunting type scopes have BDC, still wind can really eat you up out at 500 and beyond. Even with my Mil dot reticle scopes, its hard to guess a kentucky windage hold way out there. Actually adjusting the turrets becomes a necessity for precision.
"No free man shall ever be debarred the use of arms."- Thomas Jefferson