"I'd want to check, but I have a sneaking suspicion that Durandal required a delivery at no more than 200ft and at around 550kts to be fully effective. I'm not entirely sure that sort of attack profile would necessarily be conducive to the good health of a C-130 crew, even with the benefit of surprise..."
I looked up the Durandal when it came up in another thread (I think the Big Blu thread) and I thought it was a MINIMUM of 200 ft, but like you, I'd want to check