Plus-Pee
A couple of things to keep in mind when dealing with a steady diet of higher than normal pressures.
The recoil spring has very little...if anything...to do with containing pressure. Its effect is minimal because by the time it compresses enough to offer any useful resistance to the slide and barrel unlocking, the bullet is gone and the pressures have fallen off to nearly zip. The slide moves about 1/10th of an inch when unlocking begins. The only resistance that the recoil spring offers is that amount over its static preload of roughly 3.5 pounds.
The most important thing is locking lug engagement. (Assuming correct unlock/linkdown timing.) The more, the better. All three lugs sharing the load thrust equally is ideal... with all three lugs engaging at the maximum depth allowed by the geometry of that particular gun. Some will sit deeper in the slide's recesses than others...Some less. Depth is a little less important than equal horizontal engagement. The trouble is that, only rarely does a factory-fit barrel deliver that ideal. Usually, only two bear the load, and sometimes, only one. If you're lucky, it's the strongest, most supported lug...#1. If you're not, you can expect shortened barrel life due to increasing headspace as the lug(s) are set back by the pounding.
Using the EGW firing pin stop with a small radius will delay the slide a tick longer and allow pressures to drop a bit lower before unlocking begins, and allow the use of a standard recoil spring to better control frame battering.
A 23 or 25-pound mainspring will help a little too. Everything means something.
Moving down the list, good headspace is important. The closer to minimum
you start, the longer it will take for it to reach unacceptable dimensions. Again, most factory-fit barrels...essentially drop-in...are given a "pass" as long as they're under maximum. Most fall somewhere between .908 and .915
inch, with .920 being the limit. I like about .902 inch, but that's just me. Some like to see it at minimum or even a bit less. (Headspace is the distance between the breechface and the cartridge stop shoulder with the gun in battery.)
Luck!