What size front blade sight do I need to bring my POI to the center of black square ? I am shooting Sellier and Bellot 303 British 180 gr FMJ bullets. The picture is of a zeroing target 3 round group at 25 yards at a 1.5 inch by 1 inch black square the current front sight blade size on the rifle is .030 Can anyone tell me what size front blade sight I need please. Thank you https://www.milsurps.com/images/impo...img_1410-1.jpg