2-3 bb's fall out of your mag is normal happens to me to its cause it loads 4 into your hopup chamber, the only time this doesnt happen is when my mags has a piece that protudes the top when empty.
Check your hopup rubber as well its on your barrel in the hopup for any cracks or breaks, that can reduce FPS if its not a tight enough seal or if its bent and getting in the way of the bb
|