I have bought an old 16ga single recently and I really like the gun. So much so in fact that I would really like to make a couple rifle barrels for the frame. One is 22lr which I know is going to be interesting due to offsetting the barrel up or down to allow for the centerfire firing pin to impact the rim of the rimfire round. The other that I want to do is a 32 caliber revolver round barrel, but I can’t figure out where to stop with ridiculousness there. I know .327 is way too hot for this old reciever, but 32long should be very easily contained. I wonder about 32 mag? 38spl? 38SW? So what numbers should be compared? Just saami pressure max? PSI on breechface? Just trying to understand what I really want to do before I jump into it.