Drill bit speed

[Clark]

I have foam parallel bars for putting the stock in the mill vise.
I get the action screw holes lined up with the mill by chucking up a pin gauge. When the pin goes in and out without friction, the mill and the hole are concentric.
I incrementally increase drill sizes, while drilling at low speed, until the pre compressed pillars on the action will drop in without touching the hole in the stock.