It has a set trigger and a firing trigger. When I cock the hammer, it won't hold. I can feel it slip past the set trigger position and it stops at some kind of "half cocked" position. When this happens, if I pull hard on the firing trigger the hammer snaps down. I've actually shot it that way a few times but I don't like to shoot with a malfunctioning lock. More about the lock: don't know the manufacturer or the model number, and I don't know how to upload pictures onto this forum. Another thing that's happening is it when I pull back on the hammer, at about halfway it starts to drag like something is binding. I degreased the lock and scrubbed at it with a toothbrush and brake cleaning solvent trying to get any unseen bits of crud out of the way, but it didn't help. I have to admit that I think if I take this lock apart I'll never get it back together again. Oddly, the lock works better if I loosen the lock player's main screw so the entire lock can wiggle around a bit. I've shaved down the lock's mortise in case something is rubbing against the wood of the stock. It's not rubbing against the drum or the breech. Two questions: what is the proper lube for all those little moving parts parts in the lock, and two, any ideas at all about what might be going wrong? By looking I can't see that anything is bent or twisted. The main spring is still good and strong and I can't see any metal shavings or other signs of undo wear. Any help would be much appreciated. Thanks guys.