Jammer:
Before you do any more stoning on ANY hammer hooks I want you to take a good hard look at some of the pictures I posted. The reason for those radiuses in the bottom corner is because someone tried to polish the hooks, or make them bear evenly on both sides. As the stone advanced the hooks it left the radius.
If you are setting up a service pistol (read that to mean a personal pistol that is carried as, or intended to be otherwise used as a weapon) stoning the hooks on a standard Colt or USGI hammer can be counter productive. The procedures and methods that are used to make the "ideal" trigger pull on a target or combat game guns are different. Service pistol armorers never altered hammers and sears in the maner perscribed for MTU (bullseye) match gun builders. The 90 degrees hooks/break-away angled sears systems were originally developed during the late 1950/early 1960 by the military match armorers, and remain the basis for what is generally used today on most custom 1911 pistols. It is interesting to note that during this early period the military match gun builders had a special "match grade sear" but no match grade hammers. Instead they used regular service hammers and altered them for their own use. It was emphasized that it was absolutely necessary to maintain the 90 degree angle with a sharp corner in the bottom, and they were very careful to be sure that was done.
Before you do any more stoning on ANY hammer hooks I want you to take a good hard look at some of the pictures I posted. The reason for those radiuses in the bottom corner is because someone tried to polish the hooks, or make them bear evenly on both sides. As the stone advanced the hooks it left the radius.
If you are setting up a service pistol (read that to mean a personal pistol that is carried as, or intended to be otherwise used as a weapon) stoning the hooks on a standard Colt or USGI hammer can be counter productive. The procedures and methods that are used to make the "ideal" trigger pull on a target or combat game guns are different. Service pistol armorers never altered hammers and sears in the maner perscribed for MTU (bullseye) match gun builders. The 90 degrees hooks/break-away angled sears systems were originally developed during the late 1950/early 1960 by the military match armorers, and remain the basis for what is generally used today on most custom 1911 pistols. It is interesting to note that during this early period the military match gun builders had a special "match grade sear" but no match grade hammers. Instead they used regular service hammers and altered them for their own use. It was emphasized that it was absolutely necessary to maintain the 90 degree angle with a sharp corner in the bottom, and they were very careful to be sure that was done.