They are the only manufacturer in the states that will do a light contour in those calibers. I had heard of them before, but I spoke with John Linebaugh, (of .475 fame), about them. He said that is who he prefers to use. I'm lucky enough to sort of know him, and see him occaisionaly. He is a great resource to have for this project which he offered to help me with. He was really steering me towards the 9.3 round. But, he also said that the 405 would be adequate also.