It depends on the loading. I have a 9 mm carbine, and from the numbers I've seen, you get negligible improvement (less than 5% increase in muzzle speed) compared to my Glock 19. Shooting the carbine is a LOT more accurate, though (I believe this is from having better control over the carbine as opposed to the handgun). I can't find any clear online documentation of this though, though you can peruse KEL-TEC's SUB-2000 manual for a graph demonstrating muzzle energy from a 16" barrel at http://kel-tec-cnc.com/images/downloads/sub2kmanual.pdf. You can do a quick and dirty comparison with crappypedia's page at http://en.wikipedia.org/wiki/9_mm. The only comparable figures are 115 gr FMJ, fires from a 16" barrel at 1350 fps, and from whatever the typically ill-documented wikipeida source used (I'd assume a 6" barrel) at 1300 fps, a 3.8% improvement for the rifle.Abraham wrote:joe 817,
Great information!
Are pistol calibers like the .44 out of a rifle far longer reaching than out of a pistol, thus making them practical for a rifle?
Or are they limited to some degree say as compared to a 30-30 or .35 Rem?
My question is based on the idea of getting a 9mm rifle to match my pistol. Keltec makes one.
You can compare 44 magnum ballistics fairly easily though.
Handgun: http://www.accuratepowder.com/data/PerC ... data/44Cal(10.97mm" onclick="window.open(this.href);return false;)/44%20Remington%20Magnum%20pages%20133%20to%20135.pdf
Rifle: http://www.accuratepowder.com/data/PerC ... andarddata(Rifle" onclick="window.open(this.href);return false;)/432Cal(10.97mm)/44%20Remington%20Magnum%2020inch%20page%20330.pdf
Pay particular attention to the heavier bullets, like SRA 300 JSP. Since they move slower, they spend more time in the barrels, giving the load more time to act on them before pressure is released (eg before they're out of the barrel). These bullets/loads generally show a 20% increase in muzzle velocity out of a 20" rifle compared to a 7.5" revolver. With a given bullet mass, that's close to a 20% increase in impact energy, which is significant at the higher end.
There's a lot more to the math, but those numbers are good indicators overall if you want a rough comparison.