I was curious, can this be done? I want to make a sniper character who can fire rapidly (hence Fast Shot) but I'm thinking I'll use little to no armour so I wanted so capability (and accuracy) in VATS regarding headshots for situations where you can't avoid close quarters combat such as the vaults.

I was thinking perks along the lines of Sniper and Lonesome Road, considering these perks are multiplicative and Fast Shot caps max accuracy at 75% would that offset the penalty (75 x 1.35 = 101.5 capped at the regular 95) or not?

Does Fast Shot drop the AP cost for firing a weapon? If not, then it won't help in VATS.

Also, if I am close enough that the number of enemies factors into my tactics, I am not using a bolt action rifle, which is what most sniper type guns are. Even with Fast Shot (not using VATS) it is easy for me to get overwhelmed.

To me, Rapid Reload is better for battle efficiency. Again, not sure if it helps VATS or not.