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Reading the instructions for a number of 80% frame finishing mill fixtures, I see that they say to use a #22 and #35 drill for the hammer and sear pin holes. Is drilling accurate and well-finished enough for this application, or should those holes be drilled undersized and then reamed?
 

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on my 80% I used the drills that came with the jig, the pin holes came out a little tight. The bits were probably slightly undersized. Either way, it worked out fine
 
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