Mr. Steel
Reading Ackley's blow up tests was one of the major influences in my decision to not press my luck any further with the .270 WCF in a dovetailed receiver ring WW I Mauser action.
I also agree with your opinion on the usefulness of Mauser cartridge designs based on the 57 mm case however in my case it took many years of fooling around with more powerful & inapropriate cartridges to figure this out. Too soon old & to late smart! I still prefer the Mauser 98 design over all others for a reasonable range hunting rifle.
