I have two very different questions related to the CX4 Storm and carbines generally.
First, what do people think of the Beretta CX4 Storm compared with other 9mm carbine offerings? Pro's & con's?
My second question is regarding ballistics.
I like the idea of shooting a pistol round in lieu of 5.56/.223 defending my home (not that the latter is not an excellent option, it is). I'm also a big fan of the .357 SIG round though most of my pistols are 9mm. I was thinking I could get .357 SIG ballistics with a 9mm bullet out of a carbine; however, I was wondering if increasing velocity is going to negatively impact penetration.
So for example, while an HP bullet might work as well or better at faster velocities resulting from the much longer barrel of a carbine, I assume fluted bullets like the XD line from Lehigh Defense & Underwood might not fare so well.
.357 SIG (.355") XD bullets have larger flutes than their 9mm Parabellum (.355") XD brethren to better slam on the brakes (so to speak). So I assume shooting XD 9mm Parabellum bullets out of a 16" carbine would overpenetrate and possibly be less effective at stopping someone (as much of the energy might be wasted depending on how clean the passthrough is).
I assume varying levels of success may also occur speeding up 9mm HP's as well, but I can't speak to the velocity limits of HP bullet designs with any knowledge. But differences in bullet designs in 9mm XD bullets (whether 9mm Parabellum or .357 SIG) seem to exist in these Philips screwdriver-like bullets that I am fond of.
I sent Underwood an email asking if they've thought about developing 9mm carbine bullets specifically. I'll report back if I hear anything.
Anyway, any information & opinions are greatly appreciated. Thanks in advance.