there is that little of differance? if you actually have the right drill bit size and drill it with the drill press i would think it would be fine?? you would have more of a chance makeing it egg shaped useing a carbide bit? i will be pressing them in i just want it the actual right size for the knurls to seat right??yogiaz said:IF you use a drill there is a good chance you will make the hole too large, and the studs will not fit properly. They are suppose to be a press fit, thus why you want to use a die grinder and only take out a small amount of material.