This is a really bad idea. The extractor is designed so the extractor groove slips under the hook of the extractor when the round comes up and aout of the magazine. It is NOT designed to be forced around the rim. You WILL eventually break the extractor.
JonMs post is very valuable. Read his post very close. If you do not understand what he means about "Riding the Slide" ask him. A failure to follow that rule cost me a second place win at the Midwest Regional IPSC Championship some years back.