Sight down the stock with a surveyor's transit, then read the MOA (Minute of Angle) from the northernmost part on the gun. Take the number you derive and divide by pi. Now multiply that number by the the exact range from the butt plate to the target, and find the square root. Raise the result to the 2nd power, and you have the corrected LOP. Simple hey?
Just kidding--read Nortonics post. I'm an idiot about LOP--I just correct for it when hunting and have always done ok, as long as I shoot the gun alot in the off season. It's quite important in clays, though. Or so I believe--don't shoot clay pigeons except 1) informally and 2) when they become violent :lol:
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