here is the problem : I have my gun sighted in at 200 yards but I do not have a range pass 200 yards ... My gun is a sako .300 win mag , shilen barrel 26'' muzzle break ..ammo is handload 168 grain berger VLD , RL-22 powder at 3055 fps ..scope is a zeiss conquest Z-plex 6.5-20x50mm target...