Ok, so the 1858 is going to be used in anger for the first time this weekend and I was after some advice on loads. I've got the following :-

777 FFFG propellant (non negotiable due to Mrs!)
Felt wads
No 11 percussion caps
.454 balls

Now I was going to start with 20 grains (volume) of 777 which would be covered with the felt wad then I would seat the ball. My question is what is the best lube to put over the top of the ball with 777 as there seems to be loads of varied answers on the internet..