I have developed loads for a 470 NE double rifle using Hornady 475 cal XTP projectiles(325 & 400 gr) and have been extremely disapointed with their performance on light-skinned game. Absolutely zero expansion - and this is at velocities much higher than handgun velocities (not as yet chronographed - my PACT packed up!)

I had thought of getting some Speer pills - but they are hard to come by (in Australia), and I don't want to go to the effort if they are NBG as well!