I had mine out on thursday and noticed this, I could shoot very tight 1" 3 shot groups at 50m from bench rest in the x ring. when I moved out to 100m the groups were still 1" but they were in the 4 ring which suggest the bullet travels up very sharply from 50m to 100m, I could hold 4" low at 100m and group 1" 3 shots in the X-ring. This was shot using a Russian pos 6x42 scope, So I just left it zeroed at 50m, If you zere at 100m you'll be 4" low at 50m... I thought this was very strange.....