What type of ammunition has been used?
You’re probably fine with expectations of a long-lived Hi Power using but factory springs and standard ammunition. I do think the gun is best served with the 18.5-lb recoil spring and buff in any instance where at least standard pressure ammo’s being used. If you intend to use the warmer loads, I believe the heavier spring/buff is essential for extended shooting over years. I do not recommend steel-cased ammunition for the Hi Power as it was not designed for such and have some reports in where some extractors appear to have been damaged from constant use of this type of ammo. Has the mainspring been lightened? The mainspring (hammer spring) comes from the factory at 32-lbs. Not considered by some, reducing it has the same effect as reducing the recoil spring in that there’s not as much resistance to the slide’s rearward movement. That said, I have a couple of older Hi Powers that came with the lighter mainsprings and they’re working fine after decades of use. (I do use slightly stronge
