Do you think you could hit the hole perfectly everytime? For me, it's a game. You know what they say....every once in awhile a blind squirrel finds a nut.
Love using the Dewalt Stud/Joist drill. Lots of power and good balance for this task.
Buy here
https://amzn.to/47ADp3V
Midwest perma Column Brackets are perfect for building a long lasting post frame structure
(800) 798-5562. call ask for Dave and Drop my name! should give you discount too!
Also, if you want Post Frame building plans that show all of these details check them out
https://rrplans.bigcartel.com/