Last Saturday I shot my TC Hawken .50 for the first time in three weeks after shooting 50 or more shots in a silohuette shoot the last time out with no problems. I had gotten some Lyman sights I needed to sight in for the next shoot this coming Saturday. The morning was overcast and humidity must have been 100% with temp in the middle 80's at 10 AM. I loaded up with 60 grains of Goex FFFg and TC lubed .018 patch and .490 ball. Put the cap on pulled the trigger and cap went off with no big boom. Tried another cap an no big boom. Took the nipple out and poured some powder in and finally big boom. I had swabbed with moose milk and dry patched prior to the first shot. Had problems with slow ignition off and on in 10 shots I fired. I swabbed and fired a few caps and then tried to seat another ball. It got stuck about a foot down from the muzzle. I couldn't pound it down. Took the nipple out and poured moose milk on the powder charge and put it in the truck and then shot something that didn't use blackpowder for a while. Got the hawken home and used the fence post and some rope tied around the range rod after screwing it into the ball and proceed to pull it out. Came out looking like a hollow point conical patch and all. I proceeded to give the gun a thorough bath. I didn't pump wash it the last time. I just cleaned it with moose milk and put bore butter down the barrel. I got some rust out after running a brush through it about 30 times. I guess that caused all my problems. That and the high humidity so I stored it away with CLP down the barrel and hopefully won't have problems this Saturday. Any tips and tricks to avoid a session like that in the future?