If you are going to drill holes in hardened tool steel then you better buy some good (expensive) bits and run them at the correct speed. One more good reason to simply bob it with a cutoff wheel. I have bobbed a bunch of revolvers and never had one fail to set off a primer. Unless someone installs a wimpy cut down mainspring bobbing the hammer will have no effect on reliability. Plus faster locktime and no snagging. All of my competition and carry revolvers have the hammers bobbed right down to the frame when the hammer is forward. Avoid CCI/Speer primers if you do this though. Those things are stupid hard. Federal makes the best primers anyway.
Last edited by drail; November 12, 2012 at 11:52 AM.