Measure the distance between the rear sight and the front sight to get the sight radius (inches). Divide this number by 3600 (100 yards is 3600 inches). The result will give you how much you need to file down your front sight to raise the impact point of your group 1 inch. For example, if your sight radius is 22 inches, 22/3600=.006; you would remove .006 inches (roughly half the width of a business card to give you perspective of what this number means) for 1 inch of group/impact movement. If you multpiply that x 8 = .048, this is the amount you would need to remove from the top of the front sight to raise your group 8 inches at 100 yards in my example.
So, for your Mississippi, measure your sight radius, divide by 3600, then multiply by 8. But, don't take it all off at your workbench. Take off half, then go to the range with a file and 50 rounds. Shoot 3, assess the impact, file a few thousandths, shoot 3 more,assess impact point again, continue this process slowly to refine and finesse your group up to where you want it. You an always file off more metal, but you cannot put it back on.... Good luck!
Tom
Tom Magno, 9269V
29th Wisconsin Volunteer Infantry
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