It was shooting great with 2 3/4 and I like it. Then I shot 3 3" and the fourth one went into the ground about 20 yards, I thought something I must have done so tried another. Same thing. The dot had moved a bunch. I had it on an 870,old wingmaster so it was not an especially light shotgun. Might never happen to another one who knows. The trophy was a few years old so a new one might not do that.