Absolutely. I never apply a scope for rangefinding at a lower than highest power. Mine calcs out , AND MEASURES 2.4 IPHY @ 18x (dots become ~1/2" instead of 3/4's at cald. power). Mine is used for rangefinding and windage (turret for elevation) at this power for prairie dogs out to ~500 yds. on this 17 Fireball XP--
I've only used mine once to try and range them, but conditions were hot and i was in an uncomfortable prone position laying on rocks. Was still able to get within ~10 % of lasered out to about 300 yds. or so most of the time. IMO, it's still considerably better than guessing.