American Rifleman, April 2002, pgs. 20 - 21, Shooting Editor, Scott E. Mayer, uses Load From A Disk ballistics program to develop the .400 Marlin Wildcat cartridge. Predicted velocity was 2,500 f.p.s. for the 180 gr. bullet. Actual chronographed velocity, from the completed rifle, was 2,525. Scott states that, "The current tools and technology make wildcatting easier than it ever has been before. If you have been kicking around the idea, you should go for it and make a cartridge all your own."