If you have a weak extractor it can sometimes be reshaped and hardened again ( doesn't work all the time ,but worth a try ). Check the hook on the extractor as well ,they get worn down. You can improve/renew/deepen the angle of the hook by a careful application of a very fine cutting wheel on a dremmel tool. Check the hole in the bolt where the stud of the extractor fits, and make sure it is not full of crud in the bottom (holding the ext. away from the bolt). It doesn't hurt to take a few thou. off the bottom of the stud just on principles anyway. One other thing I have done is to silver solder a broken extractor and re heat treat it . Likely more by good luck than anything else, but it did work and is still ok. Hope some of this helps a bit....catnip. PS. twenty or so years ago a local gun shop had 100 of the last original cooey extractors, and had the awful price of $2 each on them. Isn't hindsight great?