They all have the same charge Haz, just different case lenghths. And Ellis, my Granddad was one of those "ritzy folks". He used to load .38s with just the primer and a couple of grains of powder and shot them at ten yards in his workshop.

As far as CB caps, they are kind of obsolete. You can get a spring piston .22 airgun that will give you better accuracy and more power. RWS and Gammo will get you 1,000 to 1,5000 fps for not too much cash and a whole lot less legal hassel if you shoot them in the backyard. The CB used to fill the same nitch, killing tree rats without creating a hazard or getting the cops called on you. Now, just get an air gun.
FQ13