A paintball loader for supplying a plurality of substantially similar paintballs a paintball marker. The loader comprises a housing adapted to receive the plurality of paintballs, the housing defining a feeder tube in a base thereof, the feeder tube dimensioned to allow single passage of the paintballs, a paintball receiving member comprising an elongate receiving channel spiraling radially outward in a direction of rotation from the feeder hole and having an outlet adjacent the feeder tube, the channel comprising a pair of opposing side walls spaced to allow single passage of the paintballs, and a feeder arm positioned across at least a portion of the channel walls such that the feeder arm comes into contact with one of the plurality of the paintballs when in the channel. The channel is rotatable relative to the feeder arm about the feeder hole in the direction of rotation.