I was going with a PLUS ONE for Abilene, but if your down to just the Hammer and Cylinder and it's still stuck, I don't even have a WAG without looking inside. Butt - If you left the hammer in the gun and the .... nope. not even a guess without having it in-hand and looking inside.
If Brandy dam'd New, the Barrel Breach may be jamming against the Cylinder Face, stopping rotation. Or yer just not holding yer tongue just right, maybe.