My 1911 hammer bite journey...condensed.
Started with this one, a WW I 1911. After a couple of dozen shots it made the blood run. I installed a Commander hammer, and it still bites me.
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Next, a Para Ordnance P-13. I installed a beaver tail safety using an Ed Brown button-type jig. It mounts in the frame's safety hole and you just file off everything that sticks out. Pretty slick, but as noted in a post above, it did require rebluing. It doesn't bite at all. Very accurate pistol, but sort of ugly. It's sterling performance outweighs its appearance, so I keep it.
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Another attempt dating to just a couple of years ago, a Rock Island 1911. Bad biter, but I had just one of several King's Gunsight drop in beaver tails left from my gunsmithing career. I installed it, and it lessened the problem, but I still got nipped sometimes, so I judiciously ground down the rear of the hammer until the problem went away. I was about to send this pistol off to the auction awhile back, but decided that the (currently) $400 it might bring in wasn't worth the value of a good 1911-- so I kept it!
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DG