Ase Utra Having just fitted this on my 30-06 does it have a settling in period ? My groups at 100yds are about an inch without the mod but when I fired with the mod the group opened up in a line going some 6 inches across left to right top to bottom. I checked it was screwed on properly most at the range said to clean it but having only put a dozen or so shots through it I don't think that will help. Any views ??