According to:
http://www.capsuleworld.com/ (http://www.capsuleworld.com/)
"Fill weights within +/- 5-7% of mean (average) based on using pre-measured powder for each batch & tamping. Complies with U.S. & International Pharmacopoeias."
This is for bulk manual packing of capsules. Not sure whether the 5-7% is S.D. or limit error.