6.5mm or 6.5mm gauge may refer to:

Rail transport modelling

* Z gauge, 1:220 scale with rails 6.5 mm apart, representing standard gauge * Nn3 gauge, 1:160 scale with rails 6.5 mm apart, representing metre/3-foot gauge *

H0f gauge H0f gauge (or H0i gauge) is a rail transport modelling scale representing Feldbahn-style 2 ft and 600 mm gauge railways using 1:87 HO scale running on Z gauge track. The ' NEM 010 specification defines H0f for modelling gauges , as part of the 1 ...

, 1:87 scale with rails 6.5 mm apart, representing narrow gauge

Firearms

Pistol cartridges

6.5mm Bergmann The 6.5mm Bergmann is an unusual centerfire cartridge produced for very early self-loading pocket pistols. Design The case is bottle-necked and steeply conical, and headspaces on the conical case walls. Early versions were made without any r ...

, centerfire cartridge * 6.5×25mm CBJ, pistol cartridge

Rifle cartridges

6.5mm Grendel The 6.5mm Grendel is an intermediate cartridge jointly designed by British-American armorer Bill Alexander, competitive shooter Arne Brennan (of Houston, Texas) and Lapua ballistician Janne Pohjoispää, as a low-recoil, high-precision rifle cartr ...

(6.5×39mm), cartridge designed for the AR-15 *

6.5mm Creedmoor The 6.5mm Creedmoor (6.5×48 mm), designated 6.5 Creedmoor by SAAMI, 6.5 Creedmoor by the C.I.P. or 6.5 CM or 6.5 CRDMR for short, is a centerfire rifle cartridge introduced by Hornady in 2007. It was developed by Hornady senior ballistics ...

, centerfire rifle cartridge *

6.5mm Remington Magnum The 6.5mm Remington Magnum is a .264 caliber (6.7 mm) belted bottlenecked cartridge introduced in 1966. The cartridge is based on a necked down .350 Remington Magnum which on turn is based on a shortened, necked down, blown out .375 H&H Magn ...

, belted bottlenecked cartridge * 6.5×42mm, also known as 6.5 MPC (Multi Purpose Cartridge), centerfire rifle cartridge *

6.5×47mm Lapua The 6.5×47mm Lapua (designated as the 6,5 × 47 Lapua by the C.I.P.) is a smokeless powder rimless bottlenecked rifle cartridge that was developed specifically for competition shooting by ammunition maker Nammo Lapua and the Swiss rifle manu ...

, smokeless powder rimless bottlenecked rifle cartridge *

6.5×50mmSR Arisaka The 6.5x50mmSR Arisaka is a semi-rimmed rifle cartridge with a 6.5 mm (.264 in) diameter bullet. It was the standard Japanese military cartridge from 1897 until the late 1930s for service rifles and machine guns when it was gradually repla ...

, Japanese military cartridge * 6.5×52mm Mannlicher–Carcano, Italian military cartridge *

6.5×53mmR The 6.5×53mmR, originally and more correctly produced as the 6.5×53.5mmR, and in the early Imperial (English) nomenclature also known as the .256 Mannlicher, is a late 19th-century rimmed centerfire military rifle cartridge similar to other earl ...

, Dutch and Romanian military cartridge *

6.5×54mm Mannlicher–Schönauer The 6.5×54mm Mannlicher–Schönauer also known as 6.5×54 Mannlicher–Schönauer Greek or simply 6.5 Greek is a 6.5 mm (.264" cal.) rimless rifle cartridge used in the Mannlicher–Schönauer rifle. It is the direct descendant of the 6.5� ...

, Greek military cartridge * 6.5×55mm, Swedish-Norwegian military cartridge *

6.5×68mm The 6.5×68mm rebated rim bottlenecked centerfire rifle cartridge (also known as the 6.5×68mm RWS, 6.5×68mm Schüler, or the 6.5×68mm Von Hofe Express) and its sister cartridge the 8×68mm S were developed in the 1930s by August Schüler from th ...

, rebated rim bottlenecked centerfire rifle cartridge *

6.5-284 Norma The 6.5-284 Norma originated as a wildcat cartridge based on the .284 Winchester cartridge necked down to 6.5 mm. History The parent case .284 Winchester was created around 1963, but did not see extensive commercial use. The 6.5 caliber ...

, wildcat cartridge {{letter-number combination disambiguation