Quote:
Originally Posted by jwp475
Why are the range finders in different units?

Rangefinders are available which measure in yards, meters, and feet. Use whatever you're comfortable with. Mils, MOA, yards, meters or feet don''t matter if you know what you have, how to use it, and understand the ballistic calculations. cards for mills or MOA or the number of keystrokes on a calculator are the same complexity. They're all useless if you don't know how to use them.
A ballistic reticle is no more complicated in meters or yards, but what you're more familiar with will make give fewer mistakes. It's not unusual for someone to post that brand xxxx rangfinder they tested has a 9% range error because they didn't realize it was set to read in meters instead of yards or vice versa.
The mildot system was conceived to allow range calculations to be made mentally, but nearly no one in the US uses mildots in the way they were originally conceived. That's because people don't think in decimal yards in the US. Europeans do think in decimal meters. The "right" way to use a mil dot scope is just to think "how far apart are adjacent dots on the target?". Then just move the decimal point 3 paces and that's it's distance in the same units. Unfortunately that doesn't give useful results using inches, feet, yards. How useful is it to say the dots appear to be 25 inches apart on the target so the target is 25000 inches away. That's correct, but what person in the US thinks of 25000 inches as 694 yards without doing calculations?
Mil dot works nicely for Europeans because they think in millimeters, centimeters, and decimeters. Americans think in inches and feet and yards , but 1/1000 or 1/00 or 1/10 of yard means little or nothing to most Americans. It's probably easier though to learn to think in decimal yards than to do calculations every time. Using MOA doesn't help. There is nothing special about a minute of arc. It's a relic of navigation and astronomy from dividing a circle into 360 parts and that in 60 parts. It is very close to the angle the Earth rotates in 4 seconds of time with respect to the rest of the universe.. There are exactly 21600 MOA in a circle, but there's nothing special about that number for doing range calculation. There are exactly 2 PI *1000 milliradians (Mils) in a circle. That's a little over 6283 mils in a circle but it's an irrational number which cannot be exactly represented by a fraction or decimal number. For most Americans doing range calculations in mils or moa makes little difference and are equally easy to learn.
Having 1/10 mil clicks or 1/4 MOA clicks shoudn't make much difference.. You still have to learn to use either on. Calculators can handle either with a tiny software change. Brains take some time to learn either system. There may be some advantage to having the same units for clicks and reticle markings. There can be advantage to having them different too.