.503 is what I measure.. they load very nice in most of my rifles. Not too hard, and not too loose. The sabot is .023 (x2) =.046 + .457 for the bullet.

The bullet is a very solid looking thing. The actual hollow point (which is the pure lead part) is not real deep .101 is all and then the copper that wraps the lead core looks very well attached to the core.

Sabotloader can explain all of this a lot better then me.