so ive done some more looking. i really appreciate the real world math you did gregg reece.
everyone is comparing gun bullets to sling bullets which i think is a fair comparrison. the prices may be off but im talking just weight. 10 sling bullets is 5lb. im going to go with that
powder is alot harder. there are a few powders in the game. the advanced player guide has a few
general powder is 1/2lb for a bag
sneezing powder is 2lds for a pouch
weapons blanch is 1/2 lb for a bag.
from thier descriptions it seems weapons blanch had the consistancy of black powder.now how much is in a bag. general rule is a bag is 1 use like a spell component bag. you carry black powder in a metal flask which weights 1/2 lb. i would say you need about an once a shot. most flask i know are about 8 oz so 8 shots = 1/2+ weight of flask
so if you start with 50 of each
25lb of bullets
3 lb of black powder
3lbs for the flasks to carry them in
now i think the bullet weight is high for sling bullets. you can argue that a gun bullet is smaller which i might agree with so you could make it 20 bullets is 5 lbs.
just some thoughts. im starting a new campaign and one of the players wants to be a gunslinger. he wants to just load up on stuff so he doesnt run out.