OK, So I've finally got enough money together to get my first Garand. I'm planning on picking it out at the Gun show this Friday, but now I'm getting all these people telling me I can't shoot Commercial Ammo through them. Is this true?? Partially True?? Or Myth??? If it is, are there any types I can shoot, I've already purchased some 180 Gr Core Lokt and Federal ammo. Thanks for the Help.