User blog comment:Coyote and Smart Alek Co./Tips for cannon rams/@comment-4073517-20110614041145

Usually by level 20 in cannon defense you should have received a good cannon ram. I use my Gunner's Cannon Ram, it's rare but it reloads REALLY fast, especially that I have a rank 7 with the 2 boost because I have it on rank 5 with skill points.