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An IMR smokeless powder for reloading The Hagley Museum in Wilmington, Delaware. IMR Legendary Powders is a line of smokeless powders which are popularly used in sporting and military/police firearm cartridges. The initials 'IMR' stand for Improved Military Rifle powder. IMR powders makes a line of various types of smokeless powder suitable for ...
By 1936 improved DuPont process control produced batches conforming to published reloading data rather than requiring different charge specifications for each batch; [11] and those propellants have remained in production. Non-conforming batches were used to load commercial and military cartridges following traditional testing procedures.
The .308 Marlin Express was designed to produce performance similar to the .308 Winchester. This would give lever-action hunters improved performance over their .30-30 Winchester rounds. The table below shows how the rounds compare. Note that reloading data for 160-grain (10 g) bullets for some of the cartridges is not available.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
.500 Black Powder Express.500 Jeffery.500 Nitro Express.500 S&W.500 Bushwhacker.500/450 Magnum Black Powder Express.502 Thunder Sabre.505/.404 Stewart.510 Beck.577/450 Martini–Henry.577/500 Nitro Express.577/500 No 2 Black Powder Express.505 Gibbs.510 DTC Europ.510 Whisper.55 Boys.56-56 Spencer.575 Miller & Greiss; 20/577 Alexander Henry
Hodgdon distributed spherical powders HS-5 and HS-6 for shotguns and H110, H335, H380, H414, and H450 for rifles. [10] DuPont added IMR 4895 to their retail distribution line in 1962, and added IMR 4831 in 1973 when supplies of surplus H4831 were exhausted. [11] Hodgdon then acquired newly manufactured H4831 from Nobel Enterprises in Scotland.
To increase powder capacity, the shoulder is located higher than the 6.8, and the case is longer. The neck is sized for .224 caliber bullets. 224 Valkyrie : Uses 6.8 SPC cases, trimmed shorter, and the shoulder re-formed at a lower location due to being designed for using relatively long "high BC" (Ballistic Coefficient) bullets.
The .375 SOCOM is a fairly new cartridge, designed by Tromix in 2013. Taking a .458 SOCOM cartridge case and sizing the neck down to .375 caliber, resulted in a hard hitting AR-15 compatible cartridge, that has a considerable velocity and range advantage over the .458 SOCOM as well as other big bore AR-15 cartridges.