Get a hammer....
Welcome to black powder! Sorry to say this, but the only way you are going to get a .452 round ball all the way down so it is tight against the powder charge is with a hammer. I'd suggest getting some .440 or .445 balls (or a mold) and some .015 or .010 patching material (pure cotton). I went through the same experience when I started and did not have the benefit of having anyone around to steer me in the proper direction. Needless to say, I managed to break my ram rod learning what i just explained.... It would pay off to find out if there is a black powder group at your local range. If there is try to go to some of the shoots they hold. Believe me it will pay off big time.
Cheers. Steve.