405 - its fairly simple - look at the word document attached; note the data for the 7mm WSM. My 7mm WSM shells hold 82 grains of powder, my 7mm SAUM hold 74. The WSM holds 8 grains more powder. Please explain to me in some type of non mystical terms how a cartidge with 11% less capacity can shoot the same bullets 159 feet/sec faster - using the exact same powder, very similar bullets and with pressure tested equipment.
I'm willing to be corrected but I've been doing this for a long time. There ain't no magic powder, barrel, rifle, universe where things like this happen without really high pressures................
