A 30-06 in MM is a 7.62x61 round. Also considered a 30 cal.
Caliber is American, MM is Metric. One type of munitions can be called two different sizes.
No, no, no. Do not attempt to do this.
40 mm = 1.575 inches 40 mm = 4 cm
There are various types of ammunition. There are also particular guns that use the recently developed 30 mm ammunition. Among them are aircraft guns and armoured vehicle guns.
3/4 of an inch is 19 mm.
The circumference of a 40 mm circle is: 126 mm
40 mm = 4 cm
7.65 = .32 ACP
No. 40 cm = 10 x 40 mm