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L-R Hornady 250gr XTP, Hornady 240gr XTP mag, 300gr Speer Unicore, 300gr Speer Deep Curl, 300gr Speer .458
I'm not sure if they make the 300gr Unicore anymore, I'll have to check the # on the box to see if it's the same as their 300gr jacketed one.
The jacket thickness on the 300gr XTP mag is the same as the 240gr.