The hammer stays back. Almost like I didn't pull the trigger. The grease seemed to do the job. But, I don't want this to happen again if I can avoid it. Makes it hard to win at the meet when there isn't a boom.
Tell me about where did you "grease" the lock parts?
I'm trying to remember, but I think the T/C Patriot has double set triggers, doesn't it?
Will the gun fire WITHOUT using the set trigger first? Will it ONLY fire if you do use the set trigger first? Does the trigger pull "feel normal" other than that the hammer does not fall? Do you either feel or hear a click from inside the gun when you pull the trigger? Do you ever pull the hammer back and it won't stay cocked?
Even without knowing the answers to the above questions, I'm just going to take an educated guess here, but it sounds to me like the double set trigger mechanism is way out of adjustment. And that could definitely cause the problem you are having with the pistol.
Sometimes the relationship of the levers and spring tension in the double set triggers gets "too far out" and then problems start happening. The adjustment screws can loosen up over time, like the recoil from shooting it for a month or so. The problem with not firing every time usually happens, and then it can get so far out of adjustment that it won't fire at all, or you won't be able to cock the hammer and have it stay back on it's own.
Either take it to a good gunsmith who really knows muzzleloaders, or to a good friend (or fellow shooter) who is familiar with this type of pistol and have them take a look. The adjustment screw may have already worked itself loose enough to have fallen out, in which case you'll need a part or maybe two, besides the adjustments. It also may be very dirty or rusted inside on critical parts--which can change the amount of adjustment without turning a screw at all.
Hope you get it resolved soon, so that you can get back into the competition.
Good Luck!
WV_Hillbilly