Get MacCready's bugged perk, 95% chance of a headshot at any distance with any weapon!
@OP - yep you want MacCready. The accuracy is just plain crazy with his perk - and you don't even need to have him as a follower to have it!
MacCready perk is more gamebreaking than doing the all 10 special exploit. It bypasses the entire perception tree and lets u kill anything miles away with no issue.
One of the developers put a 20 instead of .20 for % lol.