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9mm Major is a wildcat cartridge of the 9mm Luger specifically for competition pistols designed to handle very high pressure. It is used in practical shooting competitions like International Practical Shooting Confederation (IPSC) and United States Practical Shooting Association (USPSA) to achieve a "Major" power factor, which earns more points for hits in specific zones on paper targets ...
124 grain 9mm Luger Full Metal Jacketed Round Nose (FMJ RN) at a velocity of 1305 ft/s (398 m/s) 158 grain .357 Magnum Jacketed Soft Point (JSP) at a velocity of 1430 ft/s (436 m/s). This is roughly equivalent to the obsolete NIJ Level II ballistic protection level. [10] NIJ HG2 9mm Luger.44 Magnum: This armor would protect against:
Conversion from kilo grain feet per second to newton-seconds is trivial, since both the grain and foot is based on SI units. One troy grain is defined as 0.064 798 91 grams exactly [ 1 ] and one international foot is defined as 0.3048 meters , giving the exact conversion factor of 0.019 750 707 768 .
The lightest published load data i can find is for Lehigh Defense 100gr "Xtreme Defense". The LD bullet is not available as finished ammunition, and I don't see anything other than blog and forum posts detailing velocities or energy using that bullet, so I don't know that it's relevant here.
The .338 Xtreme cartridge (or .338 XT for short), is based on a necked down .505 Gibbs cartridge case with a sharper 35 degree shoulder angle. Introduced in 2008 by Xtreme Machining of Grassflat, Pa, [ 1 ] the cases, commercially produced by Bertram Bullets , have a length of 3.030" and a head diameter of 0.640".
A 180 grain hollow point bullet was "acquired and handloaded to a velocity of 950 feet per second". Later on, factory-loaded ammunition was acquired that met their requirements. During the trials, the 10mm was found to be comparable to the .45 ACP (Not surprising as the weights and velocities were so similar), but the 10mm was found to take up ...
The .458 SOCOM (11.63×40mmRB) is a moderately large round designed to work in an AR-15 platform.This is achieved by installing a 458 bolt and barrel. The 300-grain (19 g) round offers a supersonic muzzle velocity of 1,900 ft/s (580 m/s) and 2,405 ft⋅lbf (3,261 J), [1] similar to a light .45-70 but with a much smaller case.
The .45 ACP, when loaded up to maximum standard pressures (none of these loads were listed as +P) will outperform .40 S&W in most weights. A quick look at the .45 GAP (which is loaded to .45 ACP +P pressures) shows that the 185 grain bullet is pushed to 1090 fps, for 488 ft. lbs. of muzzle energy; .45 ACP +P should be equal to or (since it can use a slightly slower, less dense powder) slightly ...