When I hold control over a weapon, I see the range for bonus damage. Let's use my current weapon as an example -- the possible range shown is "981-1490". I re-rolled this stat a couple times and ended up with the range "1199-1442", which boosted the dps by a good amount, which is great.
So here's my question: if I was to continue re-rolling, what is the theoretical range of ranges that I would see? Could it roll as low as "981-981" and as high as "1490-1490"? Or is there always some sort of gap in that range between min & max bonus? If there is always a gap, what is the range in the size of the gap?
The range while pressing Ctrl is given as [Lowest minimum dmg]-[Highes maximum dmg], so in your example it could roll from 981-xxxx to xxxx-1490. However, there is always a gap between the min and max dmg, if you want the exact ranges you can check it while in the enchanting window at kadala. There you have given something like [Lowest min dmg-highest min dmg]-[lowest max dmg-highest max dmg].
It does help -- I'll take a look at the enchanting window to see the ranges for my weapon (and hypothetical), and report back to this thread with the results. Whatever they are, your explanation helps explain what I can expect and where to find it.
Sure enough, there are the ranges -- for black damage (which it had rolled), it lists [981-1199] - [1175-1490], meaning I ended up with a top min value, and high max value. Good to know, and I'm not sure why I missed that previously.
I have another identical weapon without black dmg (lightning instead), but also with 9% increased dmg. I was able to subtract the bonus damage from each, and then take away the 9% from my second weapon and see, in a very real-to-me way, that the base damage was the same for both weapons. Takes just a little bit of time to work out the numbers, but comprehending how it all fits together is worth it. Thanks again!