I had just a few 400-grain .412 Barnes solids on hand, and loaded a couple of .405 rounds with 51 grains Varget, as I recall. Gave about 1880 and mild recoil -- much less than a 300 at about 2400. I was surprised. I wonder how easy it is to get to 2000-2050 with a 400 safely in a No. 1.