Hi, artillery turret is different from regular turret in factorio engine (e.g., they don't have priority turret setting like regular turret), and technology range modifier only exists for artillery turret but not regular turret. As the result, mod normally cannot extend range of regular turret via technology. Alternatively, you may use quality turret which can extend up to 50% of range. I may introduce a long range version of the mortar turret unlocked by later science packs if there is a request.