If you're going to load with black powder you will need to fill the gap between the powder and the base of the bullet. You can make a drop tube easy enough with some 3/8" copper tubing, a couple eyelets and a 1x4" board. Look on YouTube for what they look like.
Also watch videos on loading black powder cartridges.
BTW you do know the 30-30 was the first smokeless cartridge?