Everyone does. Everyone gets lucky, Efren was the luckiest of all, joke, but not about everyone getting lucky. The bigger the pocket, the more often it happens.Pro's don't cheat the pocket by accident, amateurs like me do, 4&1/4" leaves room for both
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 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.