Try this and subtract 300 to figure out your 15in shortgun velocity...

http://data.hodgdon.com/cartridge_load.asp

We can split hairs and overanalyze, LOL, but it would do just fine in a handgun. To me it looks like it would launch a 150 projectile at 2500fps+/-



Democracy is two wolves and a lamb deciding what to have for dinner. Liberty is a well armed lamb
Benjamin Franklin