.454,

This a .452-300 grain Deep Curl. You can see a small piece of copper right at the bottom of the hollow point in the lead (left hand picture - the saw cut it out of the right side). This and the contruction of the nose and copper petals is the difference between the Deep Curl and the Unicore.

The piece of copper you see inthe lead is the device they use to controll the expansion of the deep curl.