As you know H&K has a new 45 ACP carbine called the "USC" (Universal Self-loading Carbine with a 16 inch barrel. As the 45 ACP does not gain a whole bunch of velocity in a longer barrel (as compared to "magnum type" pistol rounds like the 357 and 44) I am wondering if this carbine can handle the 45 Super, 45 Triton SMC or 460 Rowland. If so, this might make a fine high powered defense gun. Any thoughts?