A paintball propelling device capable of propelling paintballs using bottom feed magazine is disclosed. The bottom feed magazine, in one aspect, includes a feed tube, a paddle wheel, and multiple paddles. The feed tube is situated between the bottom of magazine and the top of magazine for guiding the projectiles or paintballs to the top of magazine. The paddle wheel is configured to have a downward sloping surface grading from the top of paddle wheel to the edge of paddle wheel. The paddle wheel is able to turn around an axis which is in parallel to projectile travel direction inside the feed tube. The paddles attached to the circumference of the paddle wheel and configured to catch one or more paintballs rolling off the downward sloping surface of the paddle wheel. The paddles are used to push the paintballs into the feed tube.
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