Taper pins - another not so dumb question

Interestingly, they say 1:50, BUT if you calculate the .143 large diameter, .1013 small diameter, over 2", thats 1:48 not 1:50 for the first (2/0) inch size pin. No, I'm not anal enough to check every one of them, only the first ;)
 
There is a great video of the proper method of drilling and reaming taper holes.
 
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