peanutbutter

hello all,
i am looking for some information about making my own Bp. i have all the ingredients, Kn03, sulpher and charcoal. i dont have a ball mill, i have read loads of information but all aimed at experts.
i have a pestle and morter and a lot of patience. if i ground the ingredients sepreatly, and mix together through a sieve, this will give me poor quallity Bp, is this right? could this be used to make a fire cracker? or is it not sufficent? if you add rubbing alcahol ( all i could get was surgical spirit, is there that much diffrence?) if i make a past then push it through a sieve will it improve the quality?, once it dries as hard balls can you then grind it again, does a powder burn better or worse than granuals? if i ground the powder again and repeat the alcahol will it produce better quality bp, i dont really want to heat it up and i dont have a ball mill, any help would be greatly appreaciated, Thanks