I'm new to the forum and this is my first post. Hope I'm doing it correctly. I have a 1947 Colt Super 38 Auto. With the limited availability of 38ACP ammo, I was wondering if these older models can be modified to handle 38 Super +P, or an alternate caliber such as 9mm, which is more available than 38 Super? I know that some of the older 38ACP was loaded to some pretty hot muzzle velocities. Are there factory loads in 38 Super +P that produce low enough pressures to be used in my model? Thanks for your help.