I know this thread is old, but I finally got around to trying to resolve my issue. I emailed TC and they suggested I re-seat the breech plug. Even though I told them in my email I already tried, this I went ahead and did it again. The 777 primer still didnt work, so I finally went to Cabelas this week and purchased a box of TC primers. I figured if the TC ones didnt fit, none would. Turns out the TC primers fit great. I can now close the gun lightly and the hammer comes back with no problem. I find it odd that TC didnt recomend that I try a different primer, but oh well. They did say to send it in if re-seating the breech plug didnt work.

Thanks for the help from the people who suggested adifferent primer.It saved me having to waste the time sending the gun in for service.