Be sure you clean the threads both in the barrel and on the breach plug when you clean the gun. look at the amount of powder and what jags and their length. Yes, if there is a gap between the powder and the bullet or sabot it most certainly is a problem,first off its a safety problem it could act like an obstruction in the barrel, second that kind of a problem will eliminate any possibility of accuracy.
I suggest you clean everything very carefully reassemble it and put what we call a witness mark on your ramrod to show exactly where it sits with the gun empty and the load it and do the mark for when its loaded so you can tell when the load is correct.Lee