Here's an idea chaps. I have just taken delivery of a custom Dumoulin O/U .470 NE which I am taking to africa in 14 days, with woodleigh ammo. If somebody gets me the person to speak to at Barnes and they are willing to provide the ammo and sign a disclaimer saying they will reimburse me the full purchase price (not too high, approx US$12k, it was a cancelled order I bought off auction and yes I am going to try it off a lead sled next week as well as off sticks and offhand)) if,after shooting 50 rounds, when I present the rifle to the head of barrel making at H&H to see if he believes it has been damaged, is this an idea ? Put it to rest at least for modern steel. Thoughts, best, Mike