I have both and have killed moose with both. They each work very well. I have a passion for odd and unusual chamberings and was always interested in the 400 Whelen. I already had a 35 Whelen but when I met and visited with Michael Petrov, the gentleman who dispelled the headspace myths of the 400, I knew I had to build one. I t has been my favorite gun project ever and is my favorite big game round. It matches the much heralded 450/400 Nitro Express for performance, pushing a 400 grain bullet at 2150. It's a fun and easy to shoot big bore, or large medium bore if you consider big to start at 45.
