Don't know about shoulder shots but many years ago we had hogs and I'd kill them before butchering.
Well these hogs were HUGE. I had a Colt Agent .38 with LSWC handloads. No it wasn't a magnum but I found on a running hog the .38 would shoot right through and even break the spine!
So I have no doubt a good stiff .357 load is plenty hog medicine if you can shoot strait. I only use my .44 S&W cause I like the gun so much, and not because the .357 can't do the job.
"The government has confiscated all of our rights and is selling them back to us in the form of permits."