Very true. Most stainless used in firearms is magnetic, but I'm not sure the grade they use. I've found that with most SS I've used in the garage that there is at least a slight difference between the pull that a normal steel would have and what SS will do. It's actually how I test to see if the exhaust valves I have are turbo or non-turbo valves. The turbo valves are still magnetic, but much less so than the TBI/carb valves.