My apologies, Zapata. I came off waaaayyyyy too gruff, and I apologize for that. My experience with the 411 Hawk (based on cylindical '06 brass, which is very similar in case capacity). Pressure tested loads for the Hawk chambering in a 27" tube at 60,000 psi will give you roughly 2,100 fps. To get that velocity out of a 24" barrel would require higher pressures.

The 405 is a grand cartridge as designed. It will handle any of the North American game animals, as is. To get the results you are looking for is similar to turning a 30-06 into a 300 Mag. It can be done, but what's wrong with the 300 Mag? If I wanted 450/400 results from a Ruger No.1, shoot the rifle is loosely mimicking the Brit Farquharson (at least aesthetically), why not rechamber? To get the 405 into that velocity range, its not a 405 anymore. It's well beyond the design of the cartridge.

I really don't mean to sound like a jerk, though I suspect I am, but it seems very similar to those fellows trying to turn their 45/70's into 458's.

Again, I apologize for coming off so ill sounding.