In The Drawing of The Three Jack Mort takes 4 boxes of bullets for Rolands gun(The Pusher chap.3 pg.357)and puts them in his pocket. Each box holds 50 bullets. In The Wastelands Chap.1 Bear and Bones 2nd paragraph he says he had gotten "better than 300 rounds from the world where Eddie and Susanna Dean had lived". Where did the other 100 bullets come from?