IIRC, the Lee website has updated the record about which primers are Okay to use. They now appear to single out FEDERAL specifically: so do as you think greatest. In case you are firing the M1 Garand I would recommend using "military" primers as They are really greatest for that https://johnathannbnau.ivasdesign.com/53630780/indicators-on-federal-215-large-magnum-primers-you-should-know