I've changed both my 7mm and 300 winmag to Nikon Prostaff 5 3.5-14x40 FFP scopes, which I think they have discontinued. Makes it tough to do pin point load development but having my guns now sighted in to hit 400yds in 4" or less and them both for larger game I'm pretty confident at any yardage up to about 450yds will be a good shot to take something down. When shooting at 400yds you can dial up or down also around the 4" red circle to really put a circle around the circle to get it pretty accurate. I think the biggest issue when going farther is cant of the gun and being able to tell level as a little bit will throw the shot right or left and you better have a good feel for level if you do not have level helpers on the gun. I believe I have a good idea what level is.