I hate to mistreat my ramrod, I just wrap a small piece of masking tape level to the muzzle around the rod. You can write on the tape if you need to. Also if you want, you can simply remove the tape as I do, at the end of the shooting session.

Just push the projectile down onto the powder charge with as straight and even a pressure as you can muster. You will feel it stop there. Give it a little more pressure if you like, but make sure to mark the witness mark on the rod and then load to that same spot for the following shots..