Heinrich: Take a look at this site:
http://members.shaw.ca/bobschewe/
I think that will explain it. For paper, the lastest recommendation is to try using the thin " paper " in tea bags. Obviously you have to lose the tea, but the bags can make a couple of cartridges each. I have also seen recommendation for using common butcher's paper, as that paper is not impregnated with granite dust to aid writing, and therefore it will not be wearing the bore of your rifle as other papers would do. Cigarette paper is also used. Most tobacco shops sell the papers for people who like to make their own cigarettes, and sell loose tobacco for that purpose.
Of the three, I like the idea of using butcher's paper the best. Its fairly easy to buy, and a few yards can produce a lot of ammo.