I am looking for a 22lr can that is mag rated so I can run it on my 17hmr. I want one for my 556 but I was told that I can get one for my 762 and run it on my 556 as well. I am looking for at this point a 22lr can. if I can run a 556 can on my 22lr then thats the route I would like to take. I am...