What would you think of the 375 Ruger case necked to accept .411" bullets. 400 grains at 2400? maybe a little less but in the ballistic ball park. I know a 416 is more practical but the 411-412" bore is a proven performer with better SD for a 400 grain Woodleighs. I've tweeked the shoulder and taper some and forming from basic brass gives about .035" of taper and .400" of neck with a 25 degree shoulder for better extraction and feeding.