I use a 60 cal Fusil de Chasse for squirrel hunting. My load is sort of a backwoods hillbilly load but it works very well for me.
First down the barrel is 75 gr of Goex 2f.
Then I put down a wad of wasper nest about the size of a 60 cal round ball or a little bigger. I tamp this firmly against the powder. This is wasp nest, not the big football shaped hornets nest.
Next is 75 gr of #6 shot.
Then I top it off with another wad of nest, same size as what went over the powder. I tamp this tightly against the shot.
I prime with same powder. My gun works well with this.
This is just what works for me.
I've tried all sorts of materials for wadding, cards, felt, paper, cardboard, flannel, leather, tow, jute, grass and leaves but have settled on the method described above since it's simple and easy for me.