Posted: 1/18/2012 6:34:18 AM EDT
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I've bought the Brownells Sear jig, along with a .020" feeler gauge, and a set of stones. The instructions, and I'd say the Ed Brown jig works almost identical, say that after setting the set screw to .074", to mount the sear and drop the feeler gauge behind it, and "stone away" But...what if the sear sits much higher than the gauge? Should I stone it all the way down? If I don't I can't see myself getting the angle exactly right. Am I going to end up with a "short sear"? Here's what I'm talking about:  |
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You do not want to stone the sear down any further than necessary. Short sears can cause problems.
What you want to do is make sure the stone cuts the sear nose to the same angle as the stone, as it sits on the shim. You can mark the sear nose with a Sharpie, take a few light strokes, and see where the marker is removed. A 10x loupe is very useful for checking your progress here. When the marker is removed across the entirety of the sear nose, then the primary angle is cut, and you can move to finer stones to polish. As far as getting the angle right, the shim and stone will take care of that, provided you apply light, consistent strokes and don't bear down on one side or the other. Here is a good post with a lot of excellent info about the sear angle you're trying for, and how to use the Brown jig. http://forums.1911forum.com/showthread.php?p=3599043 I highly recommend that you check your sear angle against a square to verify your primary angle is set properly. |
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Quoted: You do not want to stone the sear down any further than necessary. Short sears can cause problems. What you want to do is make sure the stone cuts the sear nose to the same angle as the stone, as it sits on the shim. You can mark the sear nose with a Sharpie, take a few light strokes, and see where the marker is removed. A 10x loupe is very useful for checking your progress here. When the marker is removed across the entirety of the sear nose, then the primary angle is cut, and you can move to finer stones to polish. As far as getting the angle right, the shim and stone will take care of that, provided you apply light, consistent strokes and don't bear down on one side or the other. Here is a good post with a lot of excellent info about the sear angle you're trying for, and how to use the Brown jig. http://forums.1911forum.com/showthread.php?p=3599043 I highly recommend that you check your sear angle against a square to verify your primary angle is set properly.  |