There is a common misconception that the old double rifle cartridges ran low pressure because the rifle was not as strong as a bolt action. The situation is actually the reverse. The bolt action MUST run high pressure to get the job done because the cartridge length is constrained by the action length. The double or single shot has no constaint on cartridge length so there is simply no need to run high pressure unless you are chambering for a moderb bolt action cartridge such as the 458 Winchester because of ammo availability. if there's no need for high pressure why run it? Lower pressures are less likely to produce difficult extraction.
A double admittedly has less extraction power than a bolt action but when you blow one up it's generally a barrel failure and not an action failure.
Stress on the action is not a direct function of pressure. It's back thrust that counts, pressure times insdie case head area. A 12 gauge shotgun works up as much backthrust as many high powered bolt action rifle cartridges.
