Hey emcon, if it is an 03 hammerless, it would be a .32. If it's a .380 it's a 1908 hammerless. You are right in factory condition they only like ball. Mine have been worked so they eat anything. Timing is everything on a revolver. I would strongly suggest you send it to Colt as it is a critical operation. The aren't as expensive as you might think.
Colt's Manufacturing Company LLC > Customer Services > Repair & Refinish > Firearm Repair