A typical DAO snubnose has a trigger pull around 10lbs that's fairly long. As long as there's nothing else in that pocket, you can safely carry without a holster. Personally, I'm not a fan of it because the gun can end up upside-down, fouling your draw big time, but I've done it and, like I said, it's not really unsafe.Watched a fellow MA gun owner walk out the door behind me, whip out a revolver from his jacket pocket (not caring that the muzzle was pointing my way), load it, and toss it back in his pocket. No holster, looked to not have a hammer, and not a care in the world.
Do please make sure that you use a holster for your pocket gun, no matter the pocket you choose to store it in.