sorry for the confusion. I didn't make these changes at once, but rather as problems occurred. having read about the GI on various forums I bought it hoping I'd have a reasonable copy of a trueblue 1911-A1, rock stock and reliable. let's see, can't remember the exact order of malfunctions but I do remember it would not chamber most JHP's from full mag, the stovepipes started early, both vertical and horizontal. putting a little bend in the extractor worked for a bit then stem bind came from out of the blue. the new extractor and firing pin stop cured all of that. the steel FP and extra power Wolff FP spring were just to match up with the 23# mainspring, not completely necessary, just wanted to change it. I went to the 16# recoil spring to compliment the 23# mainspring and because "that's what is supposed to be there". I knew the gun was built on really good metal and close to if not right on original specs but wanted Wolff springs and original spring rates. anyway sometime along here I started to get ride overs aka bolt over base failures and lost all my "special" eight rd mags and went to Colt w/the semi tapered lips and could now feed ANYTHING. more bolt over base problems led me to 11# Wolff mag springs and things are starting to look real good. then a few B over B stoppages with some hotter JHPs and once again after going back to research what 1911Tuner says I put the lighter Springfield recoil spring back in and viola! she runs great SO THEN I know my slide speed was too fast and get my 14# Wolff to somewhat match the softer original and I get another B over B and come to the source to ask for help.....
please understand I think this Springfield GI is the most wonderful thing ever and I sure don't mind a very few bucks worth of what I feel are worthwhile updates and I have had more fun tinkering with this thing. I know I'm close to reaching the reliability I want but the gun right out of the box was anything but reliable, even with ball ammo.