Jim Elwell <[EMAIL PROTECTED]> wrote:
>Accuracy in firearms is often measured in minutes of arc
I am aware of the minute of arc for firearms in the US. But my experience with military weapon angle has always been in terms of the unit mil. It is an approximation of milliradian.
1 mil ~ 1 m at 1000 m.
http://en.wikipedia.org/wiki/Angular_mil
Weapon calibration, sights and compasses mil markings. Fire adjustment is done in mils. Even land navigation is done in mils. Soldiers are taught to estimate mils e.g. knuckle width is 50 mils on an outstretched fist. As far as I know, it is standard for land forces throughout NATO. The same concept (although different details) apply to former Warsaw Pact countries. I think even US soldiers use it.
I found it diffi! cult to get public details of the units used by manufacturers for weapon accuracy. But this web page is interesting:
http://www.pyser-sgi.com/index.asp?ParentID=226
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