Careful here. LE tests show that the light and fragile .223 stops more quickly in less wallboard than the standard LE pistol calibers. 9mm zips through wallboard just fine.duggy wrote:Pistol rounds speed up considerably and pack a lot more punch when shot from a 16" barrel.
Just as a quick reference, from the May 2010 American Rifleman is an article on Ruger 327 revolvers. At the end of the article is the usual 'Shooting Results (25 Yds.)" table. However this time there are two pistols so you get to see the difference in a 5.5" barrel on the Ruger Blackhawk and the 4.2" barrel on the GP100 for four different types of ammo. I'll just pick one type from the table as an example - American Eagle No. AE327 100-Gr JSP:
Vel at 10' and energy for the 5.5" = 1725 fps and 660 ft-lbs
Vel at 10' and energy for the 4.2" = 1580 fps and 554 ft-lbs
This just a 1.3" difference.
Maybe there a few of the CHLforum members that know how to access specific ballistic data for different barrel lengths.
I like the idea of a pistol carbine for home defense because they have more power than pistols in the same caliber, you can shoot them very precisely (even under pressure), have lots of shots in reserve with a large capacity mag, and you don't have to worry about shooting through multiple walls (like with a .223/5.56). And the CX4 is great choice.
When my son was in college, the guy in the next apartment was in the basic police academy. He violated a few of the 4 rules and discharged a hollow point 9mm round which zipped through both sides of the wall which separated the apartments, ricocheted off the ceiling in my son's living room, penetrated both sides of the wall in an adjoining closet, and came to rest inside.
