oops, my bad. I'll modify my values according to that and see if it match...
Edit: Correcting my table, I get this for SnF:
crit \ dmg 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400
15 11.9 12.8 13.6 14.5 15.3 16.2 17.0 17.9 18.7 19.6 20.4
20 15.9 17.0 18.2 19.3 20.4 21.6 22.7 23.8 25.0 26.1 27.2
25 19.9 21.3 22.7 24.1 25.5 27.0 28.4 29.8 31.2 32.6 34.1
30 23.8 25.5 27.2 28.9 30.6 32.4 34.1 35.8 37.5 39.2 40.9
35 27.8 29.8 31.8 33.8 35.8 37.7 39.7 41.7 43.7 45.7 47.7
40 31.8 34.1 36.3 38.6 40.9 43.1 45.4 47.7 49.9 52.2 54.5
Those values are the double of those found by Mageborn.
My understanding is that he considered that the RED was amplifying only the "non-crit" part of the bolt, while I consider that it's amplifying the "whole" critical bolt, thus using a 0.06 multiplier (instead of 0.03)...