Neale, my mate shot the chrony before I could test them. So never got around to it. They were very accurate for a big gun. So i tried them on game and havnt looked back. Probably around 2400-2500fps. Hornady data. No pressure signs.
Prior to the .458 I ran a 45/70 Ruger #1 with them at approx 2150fps. Shot heaps of camels donkeys horses and buff with the hornady 350, worked well. Ran this set up and 500 grain loads as a back up gun until a mate gave me a Mark X .458.
I still have a good quantity of them so ill stick with them for a while. Mick