3/8-10 shaft fit a 3/8-10 modified pin

I don't do many 3/8 pins the last few years. It just seems like .308 gives the joint a more snug fit but 5/16 is still an acceptable hole to start with. 10 years in and still learning stuff.
Yes it works as long as you get straight center. go figure most of those guys thread up a modified shaft on a standard 3/8-10 pin a bigger difference from .004 that a 5/16 bit would give you.
I use a .312 reamer on all my shafts that im threading into phenolic for a modified pin

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