Do in line muzzles have an advantage over traditional muzzies. In line is a single shot rifle not the muzzle loader most think of when they hear the term. Straight wall rifles are legal. Kidding me. I watched a video of a guy put 5 for 5 in a 10 inch pie plate at 300 yards with a 450, but hey there’s no rifles in Iowa. I think it’s a little late to argue method of take in the state.