its still OP shock, your not getting it.

By your idea this is how it would look

Lowest chance would be 3-3-3-3= 12damage,
4-3-3-3 = 13 damage
3-4-3-3
3-3-4-3
3-3-3-4

3-3-4-4 = 14 damage
4-3-4-3
4-4-3-3
3-4-3-4

3-4-4-4 = 15 damage
4-4-4-3
4-4-3-4
4-3-4-4

4-4-4-4 = 16 damage

That is ever single possibility and the range would be between 12-16.
With the ROF of a pbp with the damage your still getting less than 5 shots per kill and that dosen't help the current situation, it would still not make anything better.

next idea would be 2-3 damage

all the possibilities would be
2-2-2-2= 8 damage

3-2-2-2 = 9 damage
2-3-2-2
2-2-3-2
2-2-2-3

3-3-2-2 = 10 damage
2-3-3-2
2-2-3-3
2-3-2-3
3-2-2-3

3-3-3-2 = 11 damage
3-2-3-3
3-3-2-3
3-3-3-2

3-3-3-3 = 12 damage

That would help things a lot more as the 9 damage would completely screw people over making the gun a 6 shot gun

make the clip 4 or 5
with a 8-9-10-11-12
all completely random within 1 clip. it can be a different order 8-9-10-11-12
a example would be
shot 1 = 12
shot 2 = 8
shot 3 = 9
shot 4 = 11
shot 5 = 10
these orders could be changed around again and again.

This could work

You are aware that those total shots are for point blank full blast shots? Depending on the shotgun and the clip size, my range numbers are quite good. It's especially good for damage variation at different distances, since most players try to dodge and eat 2-3 bullets at a time. So really, you're looking at less damage for players in an actual combat situation, not just a point blank damage rating.