32, 380, & 9mm in KelTec size pistols

[Hammer1]

What kind of terminal performance comparison can be made amongst the 32 ACP, 380, and 9mm when fired from KelTec or Robar size pocket pistols ?

Assume all of them have lesser performance than with pistols of longer barrel lengths.

Just wondering if there were measurable differences when fired from the smallest pistols.

Or are they all the same when fired in the smallest pistols ?

 

[Tamara]

There are very serious ballistic differences among the three even in the shortest of barrels.

 

[Bill DeShivs]

http://www.goldenloki.com/ammo/gel/tests.htm

 

[P-990]

I have chronographed 9mm loads from a Kel-Tec PF-9 (3.1" barrel) and a Glock 17 (4.5" bbl). The loss from the long barrel to the short barrel is a whopping 100-fps on average.

This means your 115gr JHP that goes around 1180-fps from the Glock still does 1080-fps from the short pistol. Still worlds ahead of the .380 or .32, though the K-T P-32 is easier to shoot fast than the PF-9, IMO.