Talk:United States Navy/@comment-24787182-20150529141533/@comment-25373667-20150530183825

Actually, it's not down to the cannon you're launching from, it's down to the shell.

The way I see an anti matter cannon working is that you have a specially designed shell, with a small amount of anti matter (you only need a gram of anti matter to level DC) suspended inside a vacuum inside the shell. The anti matter would be suspended by using a magnetic field, also contained in the shell, to levitate the anti matter particles.

The shell will keep the anti matter away from matter until impact, where the shell will disintegrate, bringing the anti matter into contact with matter, causing a big boom.