Are you sure they are burned and not getting cut by the rifling? Lymans, if that is what you are shooting, have very sharp edges to the rifling when new and take about 100 rounds to smooth up.
If you still suspect burning you could try an over powder wad. Wasps nest works or even 1/2 square of toilet paper scrunched down on the powder before you ram home the ball. Some guys use a felt wad .