Johan has touched upon a little known item, the Ram Rod Ball Screw! The very early Model 1863 Rifle Muskets were equipped with a newly designed ram rod, which had the end of the ram rod formed into a "Ball Screw", or perhaps better known as a "Ball Puller". Because this end of the ram rod had a sharp point it also had a brass cap screwed over the end of the ram rod so it could be used in the normal manner to ram a bullet home without injuring one's fingers. This was a very clever idea, because it eliminated the need for a separate ball puller which was subject to being lost. BUT, once this was issued to the troops in the field a huge problem very quickly became apparent! When the soldiers came off guard duty and tried to pull the bullets out of their muskets they found that without a bore diameter guide above the ball screw, they couldn't hit the center of the bullet nose with the ball screw! What happened was the end of the ram rod missed the nose of the bullet and became jammed between the side of the bullet and the side of the barrel. This caused damage to the bore of the rifle musket, which in turn caused fouling and accuracy issues. I have actually seen original pulled bullets that showed as many as 5 attempts to pull one bullet from the bore!