I am brand new to long range shooting. I recently bought a winchester 70 .300wsm my next purchases very soon are reloading equipment and high grade optics. If I want to accurately make shots at 700 yards what factory equipment on my rifle needs to go? I am mainly wondering about the barrel. Do I need a sturdier barrel or will the stock winchester barrel be okay? Also does anyone know off hand a good reliable scope in the $400-$500 range with at least 20x adjustable magnification, tactical style turrets (the ones with the hash marks and back to zero function)? Why do people upgrade their bolt? The longest shots I've made have been in the field hunting with my 30-30 hunting deer. I finally had enough when night after night I couldnt bring the deer any closer than 300-400 yards. I knew I could shoot accurate at 200 yards with my 30-30 so I guesstimated the drop at 400 yards and missed. I came back home to read that the 30-30 should never be used really for a 400 yard shot. So here I am. I have the rifle now I need the equipment to go with it. Thank you so much for all of your advice in advance!