For many years I have used my inertia bullet puller with a heavy block of lead as the striking surface. Easier on the hand as the lead absorbs the bounce, also most bullets will require only one or two strikes to remove. I generally pull only a few rounds at a time but a couple of years ago I had to pull about 200 9mm bullets at one sitting. I frequently use my inertia puller as a light hammer on things I don't want to mark up.