My questions is how exactly does someone get a 1" group at 100 yds? I have a browning X-bolt in 7mm mag, a 4.5x14-44 Zeiss Scope and in general at the range I am able to get 100 yd groups at 3" if I really concentrate, but it is very easy to let a shot go astray. My best technique is to use sandbags to support my forearm, hold the rifle tight against my shoulder and squeeze the trigger with the tip of my finger. At 100yds it is very difficult for me to say that I am even aiming at a point within a 1/2" radius each time, so it seems to me without some device that actually holds the aim true for each shot, it would nearly physically impossible to place 3 shots within a 1" diameter. So I'm just wondering, I see a lost of posts from guys claiming sub moa groups, especially with a rifle like a 7mm mag or larger are they using some sort of aid?