I got to thinking about the large action/medium action thing and dug out my 1902 and Winfrey's volume on the Webleys. Turns out that my 450/400 is on the large action which would normally be found on the 500s and 577s through 600. But if someone wanted a heavy rifle in a smaller caliber they would oblige. Winfrey allows that the action most commonly seen is the medium size. A medium in the 400/350 or 400/360 would be a very nice combination. I had a 400/360 WR on an 1874 Transitional WR action. It was a great shooter with the 286 grain Norma bullets.