Of the three calibers I am looking at, here are the standing breech pressures for each....

9.3 x 74r: 8,823 lbs.

405 Winchester: 7,392 lbs.

.375 jdj: 10,904 lbs. (yeoouch!)

I'm really hoping to go with the 9.3 x 74r, but I'm curious about anybody's thoughts.