The point was to replicate 1rst shot HUNTING conditions Pete. In other words, replicate exactly how I personally do things before going out in the woods with a muzzleloader. Short of an actual fouling shot. Primer residue doesn't really foul the barrel and I do it to make absolutely sure there is no cleaning fluid residue in the barrel/breech plug before I load. With a test such as this I feel that was probably one of the most important things to do. Air cans only go so far I think the next test will be on the old hawken but it will be at 75 yards not 150 and more than likely one of my boys will be doing the shooting being that it's an open sight. My daughters prefer archery over firearms so they aren't as "dedicated" to proper shooting form on a gun.