i used a 20ga for two years and have gotten two deer. the first was a doe that took seven shots (it was the shooter not the gun). the sad thing was i could have reloaded a muzzle loader in between every shot and still got it. At 100yds i droped her dead. with the second deer it was a nice basket rack 8 pointer at a jog at about 80yds. it doensnt matter what kind of slugs u get. they will do the job