Just jam a cotton ball in the bottom of the impact puller. The bullet hitting the end is what dents them up. If there is a cushion, they will look like new, no matter what tips they have.
And, if you have old dull, tarnished ones, an hour or two in a stainless tumbler gets them brand new. And it does no harm to plastic or lead tips. Also, a great way to remove moly from bullets if you don't want it.
