I'll never risk one of my guns by using the screw-method.
If I dry-balled a revolver, My first choice is to remove the nipple, then fill with 3F powder, replace nipple and fire it.
If I wanted to clear a mis-loaded revolver or had a problem where I couldn't fire the gun (such as noted in the OP).....I'd prefer to (1) remove the cap, (2) remove the nipple, (3) shake out the powder, (4) add a few drops of oil into the nipple hole, (5) tap the ball/bullet out from the rear. I use a steel military pistol rod, fits through the hole for a belt size revolver nipple hole.
If it were a long rifle or shotgun, my firs preference is to remove the nipple, add a small amount of 3F powder, then ram the ball home and shoot it clear. Be sure the ball/bullet is seated well by using the ram-rod as a gage against the outside of the gun.
Slim