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Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [2] For example, a catheter with a French size of 9 would have an outer diameter of approximately 3 mm. While the French scale aligns closely with the metric system, it introduces redundancy and the potential for rounding errors.
40 mm 1.575 Ordnance QF 3-pounder Vickers: Naval gun 47 mm 1.85 inch Ordnance QF 6-pounder: Anti-tank gun 57 mm 2.244 inch Ordnance BL 10-pounder Mountain gun: Mountain gun 69.8 mm 2.75 inch 12-pounder (multiple types) Light field gun 76.2 mm 3 inch Ordnance QF 13-pounder: Light field gun 76.2 mm 3 inch 15- pounder (multiple types) Field gun 76 ...
A 12-gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in). Some also claim an increased velocity with the overbored barrels, up to 15 m/s (49 ft/s), which is due to the larger swept volume of the overbored barrel.
While modern firearms are generally referred to by the name of the cartridge the gun is chambered for, they are still categorized together based on bore diameter. [citation needed] For example, a firearm might be described as a "30 caliber rifle", which could accommodate any of a wide range of cartridges using a roughly 0.30 inches (7.6 mm) projectile; or as a "22 rimfire", referring to any ...
In artillery, caliber or calibre [nb 1] is the internal diameter of a gun barrel, or, ... Projectile bourrelet diameter specification was 0.015 inches (0.38 mm) less ...
The 6 mm and 6.5 mm cartridges are probably the most well known for having high BCs and are often used in long range target matches of 300 m (328 yd) – 1,000 m (1,094 yd). The 6 and 6.5 have relatively light recoil compared to high BC bullets of greater caliber and tend to be shot by the winner in matches where accuracy is key.
40 mm grenade (×46 mm LV, ×51 mm MV, ×53 mm HV) Autocannons 20×102mm (STANAG 3585), 20 mm caliber; 25×137mm (STANAG 4173), 25 mm caliber; 27×145mmB (STANAG 3820), 27 mm caliber; 30×173mm (STANAG 4624), 30 mm caliber; 35x228mm (STANAG 4516), 35mm caliber; Tank guns 105×617mmR (STANAG 4458) 120×570mmR (STANAG 4385) Artillery 105 mm ...
127 mm (5.0 in) 5"/31 caliber gun United States: 1889-1910 127 mm (5.0 in) 5"/38 caliber gun United States: 1930s - World War II - Cold War 127 mm (5.0 in) 5"/40 caliber gun United States: Spanish–American War - World War I 127 mm (5.0 in) 5"/50 caliber gun United States: World War I - World War II 127 mm (5.0 in) 5"/51 caliber gun