I'll admit I'm a little confused comparing the 9mm and the .40s&w.
This article states that the best rounds for the 9mm are just as good as the best rounds for the .40 s&w. It has the following examples:
Code:
Here are some samples of performance in bare gelatin:
Round Penetration Expansion Wound Area
Federal HydraShok
9mm 124gr +P+ 13.3" 0.67" 44.8 sq. in.
.40S&W 155gr 13.3" 0.68" 47.9 sq. in.
.45ACP 185gr +p 12.9" 0.69" 31.5 sq. in.
.45ACP 230gr 13.7" 0.71" 28.4 sq. in.
Federal PDA
9mm 135gr 11.5" 0.72"
.40S&W 135gr 9.6" 0.68"
.45ACP 165gr 11.3" 0.78"
Remington Golden Saber
9mm 147gr 12.8" 0.68"
.40S&W 165gr 12.5" 0.67"
.45ACP 230gr 14.1" 0.76"
So looking at this data what is the major difference between the 9mm and .40s&w.
I ask because I'm planning on getting a carbine and am waivering between the 9mm version and .40s&w version. Would I really use for deer hunting? I doubt it but it would be nice to have the option.