Here I go again starting something.
Now we all know that we CANNOT use a rifle/pistol barrel on a SB1 frame,pressure,soft receiver and all of that.But we can use the 12/20 ga shotgun barrel and order a insert from several makers in several high intensity cartridges.38 Spec SAMMI spec 35,000psi and 9mm SAAMI spec 38,500psi.
Some of you guys who know a lot more than me inform me of my lack of understanding.
Doug