Okay, so you can get a better idea of where I am coming from, here is what I am looking at. These are CIP standards measured with the piezo method. I used CIP piezo because it was the only pressure standard that I could find for ALL of them and I wanted to use the same measure for a comparison. The rifle is to be light in weight and the very long .30 FL will made the rifle weigh too much. The various x57mm cartridges and the 9.3x74R are too close to my pressure limit. An exception here is the 7x30 Waters because it is a short and very narrow cartridge.

****** Desireable Pressure *******
34k psi - piezo: .32-40
35k psi - piezo: .38-55
36k psi - piezo: 6.5x52R
36k psi - piezo: .405 WCF
41k psi - piezo: .44 Rem Mag
44k psi - piezo: .25-35
44k psi - piezo: .35 WCF (Per bonanza)
44k psi - piezo: .357 Mag
45k psi - piezo: .357 Max
46k psi - piezo: .30-30
46k psi - piezo: .30 Fl.Mag. (Not suitable because it is a very long cartridge)

****** Marginal Pressure ******
48k psi - piezo: 6.5x57R
48k psi - piezo: 8x57 JRS
49k psi - piezo: 7-30 Waters (suitable because it is a short narrow cartridge)
49k psi - piezo: 7x57R
49k psi - piezo: 9.3x74R

****** Undesireable Pressure ******
51k psi - piezo: .444 Marlin
53k psi - piezo: .303 Brit
55k psi - piezo: 7x65R
57k psi - piezo: 7.62x54R
59k psi - piezo: .30 R Blaser