[Biznicks 247x128 Accurascope] causes the Ranged Hit Chance to be wrongly calculated.
It seems to take the correct ~1.9% Hit Chance but then also adds the (Classic) 3.0% Hit Chance on top, resulting in ~4.9% Hit Chance in total.
Please see below screenshots that showcase this behaviour.
Image 1) Naked with 0.00 Hit Rating --> 1.00% Ranged Hit Chance (Heroic Presence - Draenei)

Image 2) Naked with 30.00 Hit Rating (Accurascope) --> 5.90% Ranged Hit Chance
