On The Move lets you reload ranged weapons while sprinting. It is a Tier 3 Ranged skill that is a big help in Horde fights, where stopping to reload often gets you caught.
Yes. Most players rank it among the best Ranged skills for Hordes.
Quick Reload, Under Pressure and Fight And Flight.
Start the reload as soon as you turn to run. By the time you turn back, the gun is ready.