@CG: We have not as of yet perfected this type of artillery which we call a "cannon." We are experimenting with a very large, thick-barreled, rifled gun that could launch an 8-pounder metal ball long distance. However, we have created working artillery rockets that fly almost perfectly straight due to guidance fins, and which pack a devastating 32-lb. (!!!!) explosive warhead. Tempted to test a few out?
@SaaM: Rockets are 15g each, we can sell you barbed wire, wooden boards, and digging tools for a foxhole for a total of 50g, and a hat (I assume you want something along the lines of the WWII German motorcycle infantry helmets?) will run you 25g. Deal?