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Old March 1, 2021, 01:57 PM   #6
Senior Member
Join Date: July 22, 2010
Location: Madison, Wisconsin
Posts: 845
A quick google search of (near the back) will get you the official NRA competition target dimensions.

Sticking to these scoring conventions means your friends can rank themselves somewhat appropriately in regards to how they might do at a serious competition.

You might adjust the radius of the scoring rings in proportion to whatever distance your range limits yo to. For example, if you only have a 75 yard range, adjust the scoring ring radius by R2 = 75/100 * R1 where R1 is the 100 yard radius.

Leave rings out, make centers white, whatever... my advice is stick to what is agreed on in the USA as “official” dimensions (unless you prefer Olympic dimensions.)
I hunt, shoot bullseye, plink, reload, and tinker with firearms. I have hung out with the Cowboy Action fellas. I have no interest in carrying firearms in urban areas.
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