Let X be a variable equal to distance to the target in yards.But the error is not linear...
Let C be the constant ( (pi/3) - 1) ) / 100
Then the difference between Actual MOA and Shooter MOA in inches is C * X
Looks linear...what am I missing?
Let X be a variable equal to distance to the target in yards.But the error is not linear...
2.86MOA. Let's round up and say 3 MOA
There are definitely times when you need to go out to three places past the decimal--and even beyond. In this case, I agree, two places is going to get you close enough. Rounding to 1.05 gives a percent error of less than 0.3%.(People who insist on 1.047 anything worry me)
The pedant in me feels constrained to point out that the "metric mile" is 1600 meters, not 1600 yards.Bart B. said:The world population has well accepted 4 different lengths in yards of a "mile." Statute 1760, nautical ~2025, metric 1600 and USA military radar 2000.
I'm a mathematician and round stuff like this all the time.There are definitely times when you need to go out to three places past the decimal--and even beyond. In this case, I agree, two places is going to get you close enough. Rounding to 1.05 gives a percent error of less than 0.3%.
And by the way, just for fun, approximating 1MOA at 100yards as 1" is the same as approximating pi as 3. That's probably a bit more approximation than anyone with a math background is going to be happy about--even if it turns out to be eminently practical for the application.
Be honest; when was the last time you did a calculation requiring pi and rounded the value to 3?I'm a mathematician and round stuff like this all the time.
If you’re saying that range estimation errors at around 100yds are likely to result in an error on the target that is larger than pi/3 - 1 inches, then I wouldn’t argue.My range estimation at anything around a 100yds will likely mean way more than the MOA "actual" measure.
The reason each of those has a different name (i.e. ‘statute mile’, ‘nautical mile’, ‘metric mile’, and ‘USA military radar mile’) is specifically because everyone agrees that they are different and need to be treated as different values. No one would ever suggest it’s reasonable to just randomly pick any one of those values and call it a mile without further explanation, or to round the number to some arbitrary precision and pretend that's the real value.The world population has well accepted 4 different lengths in yards of a "mile." Statute 1760, nautical ~2025, metric 1600 and USA military radar 2000.
Worse than that, the term ‘metric mile’ is commonly used to refer to a 1500 meter distance as that is the common race distance in track and field that is closest to a statute mile. This is where there can really be confusion--when one term can refer to two distinct values.The pedant in me feels constrained to point out that the "metric mile" is 1600 meters, not 1600 yards.
Few, if any, metallic rear sight's instructions mention the radius required to get the LOS angular change per click claimed.
Roger that:...sight radius on a Sharps with tang sight is usually assumed to be at or
near 36" which makes the 1/100" vernier graduations a "shooter's minute."