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.260 Remington SAAMI compliant schematic. All dimensions in inches [millimeters]. SAAMI recommends a barrel with a 6 groove contour and a twist rate of one revolution every 9 in (229 mm) with each groove having a width of .095 in (2.41 mm). The recommended bore diameter is .256 in (6.50 mm) and the groove diameter is .264 in (6.71 mm).
The specification included a Remington-designed bullet and the use of IMR4475 powder, which resulted in a muzzle velocity of 3,250 ft/s and a chamber pressure of 52,000 psi. [8] In the spring of 1962, Remington submitted the specifications of the .223 Remington to the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI).
The chamber is made with the external dimensions and leade angle found in the military 5.56×45mm NATO cartridge and the 0.2240 in (5.69 mm) freebore diameter found in the civilian SAAMI. The .223 Wylde chamber is used by rifle manufacturers who sell "National Match" configuration AR-15 rifles, barrels and upper receivers.
The 6.5mm Creedmoor (6.5×48mm), [6] designated 6.5 Creedmoor by SAAMI, 6,5 Creedmoor by the C.I.P. [4] is a centerfire rifle cartridge introduced by Hornady in 2007. [7]It was developed by Hornady senior ballistics scientist Dave Emary in partnership with Dennis DeMille, the vice-president of product development at Creedmoor Sports, hence the name.
SAAMI compliant .460 Weatherby Magnum chamber schematic: All dimensions in inches [millimeters]. SAAMI recommends a maximum chamber pressure rating of 65,000 psi (4,500 bar) while CIP provides a maximum chamber pressure rating of 4,400 bar (64,000 psi).
SAAMI compliant .30-378 Weatherby Magnum cartridge schematic: All dimensions in inches [millimeters]. SAAMI recommends a 6 groove barrel with a twist rate of 10 in (250 mm). The recommended bore diameter is .3005 in (7.63 mm) and groove diameter is .3080 in (7.82 mm) with each groove having an arc width of .118 in (3.0 mm).
.300 Winchester Magnum SAAMI cartridge dimensions. All sizes in inches (in) and millimeters (mm). The projectile diameter should be 0.309 in (7.85 mm) [9] SAAMI recommends a bore diameter of 7.6 millimetres (0.300 in) and a groove diameter of 7.8 millimetres (0.308 in).
It operates at a relatively low maximum chamber pressure rating of 21,000 ... SAAMI specifications for 45 Automatic. [12] All dimensions are in inches (millimeters)