I have a Vickers .318 ex. I used a woodleigh 250 sp on a impala, hartebeest, and zebra a few years ago. Both the impala and the hartebeest were shoulder shots that put the animal down instantly with one shot. The zebra took a hit just behind the shoulder and went down, but then got up and ran off a few hundred yards and it took two more to put him down. No bullets were recovered, all were pass thru's. Exit wounds were tiny and the consensus was that the bullets expanded very little, if at all. Since the zebra was just behind the shoulder, we figured there were no bone fragments to help as in the first two animals . I used Reloder 15 and achieved just over 2400 fps. I used Quality Cartridge for the correctly labeled cases, they were ballpark pricewise with Bertram, but had much better case life, I have had bad luck with Bertram. I am in the process of building another .318 with the L/W barrel in the mauser contour, should be a nice rifle with British lines. I have a replica bolt peep that should work perfectly on this build. There are plenty of modern cartridges that work fine, but it is good to see interest in the classics, they worked good then and they still do.