starr is good primer for bp shotgun shooting and his writing helped me imensly.. he shot a side by side choked gun and it is loaded differently than a cylinder bore often called a smoothbore,.. on this list it means it can shoot ball and shot, and has a strait walled barrel from breach to muzzel.. .. a choked gun load can take quite a few differnt loads (that will fit down thru the choke) including the double nitro cards that he used.. in cylinder bore (which means no choke) a nitro card is put over the powder, then a fiber wad, that can be lubed by various means, then shot and then an overshot card.. less powder by volume is ususally used than volumen of lead shot for best patterns.. but you will find load vary considerably between shooters.. this is from different guns, different chokes, different barrrel lenghts, different gauges, different types of shot, and of course different types of game, and different hunting teckniques... so we will need more info from you to help you as bp shotgunning is a huge subject.. dave