Wilson Mags
Ditchtiger,
I understand that you are using brand name, qiuality mags[I use WILSON mags for several of my 1911's also], but what I think 'Tuner is getting at is that mags may still be your problem. Wilson Mags[ espeially in their 8 round format] are notorious for their springs loosing tension fairly soon.....when was the last time you changed out your old mag springs and replaced them with fresh ones?
If its been awhile, check your springs.....I bet you will find that compared to a new Wilson Mag, you will see that your spring have VERy weak springs......this can cause lotsa problem during the feeding cycle.....and it can let the last round get ahead of the extractor, and make the hook snap over the rim. Thus, excessive wear on your extractor hook. The last extractor I broke....this was the issue.
I like Wilson Bulletproof extractors, but I'm also impressed with the new ones from EGW. Good luck!