Originally Posted by
T2C
I chronographed Remington 125g JSP today. The temperature was 32 degrees with a wind chill of 23 degrees where I conducted the testing. The chronograph was placed 15 feet from the muzzle.
1-Cimmaron El Maro .357 Magnum revolver with 4-5/8" barrel: Average Velocity-1370 fps, Extreme Spread-41 fps, Standard Deviation-15 fps.
2-Taylor & Company Winchester 1873 .357 Magnum rifle with 20" barrel: Average Velocity-2104 fps, Extreme Spread-64 fps, Standard Deviation-24 fps.
3-EMF Hartford Winchester 1892 .357 Magnum rifle with 24" barrel: Average Velocity-2160 fps, Extreme Spread-63 fps, Standard Deviation-22 fps.
The 1873 barrel is 15-3/8" longer than the revolver and there was a 734 fps increase in muzzle velocity.
The 1892 barrel is 19-3/8" longer than the revolver barrel and there was a 790 fps increase in muzzle velocity.
Note that a 4" increase in rifle barrel length resulted in a 56 fps increase in muzzle velocity.
Both rifles push a heavier projectile faster than my M1 Carbine pushes a 110g JSP.
Nice info, thanks for sharing!
Yeah, I was kind of thinking that there would be a point length-wise where a longer barrel would not produce much of gain (if any). Ballistics By the Inch is interesting to look at and you can see which calibers and what barrel length peaks and then begins to degrade velocity for a given caliber.
11C2P '83-'87
Airborne Infantry
F**k China!
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