I've been using PP on a couple of my salmon / muskie rods (50 & 80 lb.) for the last few seasons and never had a problem.
Also been using Fireline for many years at smaller diameters for panfish, walleye, pike, trout, bass, etc. Never a problem, except for a couple of birds' nests, but that was my fault.
My casts with Fireline are easily twice the distance of similar mono line.