I decided to test how mods effect the AP use of weapons in V.A.T.S.
I used a pipe pistol for this.
I started with standard everything, and tested each component one at a time.
As a base-line (for me) i got about 4 and a quarter shots in.
RECEIVER:
Light Frame: 6 and 1/4 shots
Heavy Frame: 3 and 1/5 shots
Calibrated: 4 and 1/4 shots
Hardened: 4 and 1/4 shots
Automatic: 3 and 1/4 shots
Armor Peircing Automatic: 3 and 1/4 shots
Hair Trigger: 5 shots
Powerful: 4 and 1/4 shots
Hardened Automatic: 3 and 1/5 shots
Rapid Automatic: 3 and 1/5 shots
Calibrated Powerful: 4 and 1/4 shots
Hardened Peircing Auto: 3 shots
Powerful Automatic: 3 and 1/5 shots
.45 Receiver: 5 shots
BARREL:
(I Used short barrel as the default dispite stub barrel being the top-most mod)
Stub: 4 and 4/5 shots
Short Light: 4 and 4/5 shots
Long: 3 and 1/2 shots
Long Light: 4 shots
Short Ported: 4 and 1/4 shots
Long Ported: 3 and 1/3 shots
Long Finned: 3 and 1/3 shots
GRIP/STOCK:
(I used standard 'grip as the default not the standard stock)
Comfort Grip: 4 and 1/4 shots
Standard Stock: 3 and 1/10 shots
Sharpshooter's Grip: 4 and 4/5 shots
Marksman's Stock: 3 and 1/10 shots
Recoil Compensating Stock: 3 and 1/10 shots
MAGAZINE:
Large: 4 shots
Quick Eject: 4 and 4/5 shots
Drum: 4 shots
Large Quick Eject: 3 and 1/10 shots
Quick Eject Drum: 4 and 1/4 shots
SIGHTS/SCOPES:
Glow Sight: 5 shots
Short Scope: 3 and 1/10 shots
Reflex Sight: 5 and 2/5 shots
Glow Reflex Sight: 5 and 2/5 shots
Medium Scope: 3 shots
Long Scope: 2 and 4/5 shots
Short Night Vision Scope: 3 and 1/10 shots
Medium Night Vision Scope: 3 shots
Long Night Vision Scope: 2 and 9/10 shots
Short Recon Scope: 3 and 1/10 shots
Long Recon Scope: 2 and 9/10 shots
MUZZLE:
Small Bayonet: 4 and 1/4 shots
Large Bayonet: 4 and 1/4 shots
Compensator: 4 and 1/4 shots
Muzzle Brake: 4 and 1/4 shots
Suppressor: 4 and 1/4 shots
It would appear that muzzles (atlests in the case of pipe pistols) does not effect how many shot you can have in V.A.T.S
Notes:
All of my fraction amounts are my best judgement not mathematically calculated
I DO have perks enabled and am not sure if they effect my test
I am also level 27 incase that also effects it
I also DO relize that there is a gap between the shot uses and have calculated accordingly
Best Mods For Pipe Pistols For V.A.T.S Uses:
Light Fram Receiver
Stub Barrel
Sharpshooter's Grip
Quick Eject Mag
Glow Reflex Sight
Muzzle Brake (doesn't effect V.A.T.S but improves accuracy)
I Got A Massive: 13. It holds 12 bullets in the chamber and if i click for the 13th shot, it displays 2 more red dashes in the AP bar, But it reloads and only shoots the 13th bullet.