Ok, I think that I have found out the factory spring weight; 16 lbs.
Here is the link where I found the info: Springs for GLOCK Semi-Auto Pistols
It lists the Wolf reduced power (14lbs), factory standard (16), and extra power (in various weights).
I do still have my curiosities about heavier recoil springs and standard range ammo. If I got an 18 lb recoil spring/guide assembly do you think 115gr range ammo would still function well in it? Or should I stick to the factory weight of 16 lbs?
So many questions...