Fantastic!!

Can we assume that 40,000 psi is a safe pressure for a quality Double action or can we go higher in medium calibers?

What are the limits for quality medium Doubles with regard to psi?

How about the obsolete "tons" of backthrust?

I believe the 30.06 runs about 52,000 psi.

How about limits of a 300 ultramag at 52,000 psi or 40,000 psi (normal up to 62,000 psi) in a Double shooting a 200 gr bullet?? Any way to predict Double survival other than to just do it/shoot it??