Since some people did not see or fully understand this yet:

Optional Experimental Shotgun Spray

The experimental shotgun spray consists of 1 center pellet + 3 pellet distribution rings.

Write "SG" at the beginning of the room name to enable the experimental shotgun spray (formerly known as SGTEST4). Followed by a number (1-5) for the size of the inner ring, followed by a number (1-5) for the size of the middle ring, followed by a number (1-5) for the size of the outer ring.
(1 = smallest, 5 = largest)

Example room name: SG424 Lets test the new spray!

Here are some more values:
SG111 (formerly known as SGTEST4L)
SG333 (formerly known as SGTEST4XL)
SG555 (formerly known as SGTEST4XXL)

You could also try SG515, SG434, SG415, etc. Just play around with the values to find your favorite.
By the way: I recommend to test the spray with 9 damage SGs.