Some Tweaks For Tactics--inspired by Fallout Tactics: Revised--is a balance mod that adjusts weapons and combat so all forms of violence are equal and weapon behavior is more in line with their real life counterparts.
The P220 is one of the weapons significantly altered. The P220 has been altered to chamber and fire .45 ACP from an 8 round magazine, and is the only .45 handgun capable of firing a "triple" (3-rd burst). This comes at the cost of doing less damage than both the Casull and 1911.