[Ardratz]

In the actual preview screen of that weapon I go from 133 to 159 SWA. (Though using an actual calculator I get 159.6) which is indeed a +20% total boost to SWA. Since my non two handed weapon's total power in combat appears to be 7 higher then the SWA shown in the weapon screen I assume the 159 also gets +7 added to it and if that 159 is actually rounded up to 160 it would add up to 167.