I usually carry the Gold Dot 9mm 124 gr +P in my 4.9" barreled Beretta 92D; recently inadvertently got box of the Short Barrel version of this cartridge. While previously its been stated on the forum that there is no difference between the two, I do not believe that this is currently the case;
-The Short Barrel has a posted muzzle velocity of 1150 fps, with 364 ft lbs of energy;
-The "standard" 124gr +P has a posted muzzle velocity of 1220 fps, with 410 ft lbs of energy;
-Speer has re-designed the hollow point on the Short Barrel variant with a wider, shallower profile.
When I spoke to a Speer tech rep about using the Short Barrel round in my 4.9" Beretta, he stated that overpenetration would likely result.
Guess I just acquired some expensive practice ammunition, at least as far as my Beretta is concerned...
Best, Jon