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Old June 7, 2019, 12:53 PM   #11
T. O'Heir
Senior Member
 
Join Date: February 13, 2002
Location: Canada
Posts: 11,588
"...into a hand drill for speed..." Reaming doesn't require speed. And a 3/16" drill isn't going to chamfer anything.
Never heard of milspec .38 Special with or without crimped primers. Crimping primers is about MGs too. Not revolvers.
Have a look here and do some measuring.
http://ballistictools.com/articles/p...d-diameter.php
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