For group shooting, Federal 205s perform as well as 205Ms. I learned this during the previous primer shortage years ago but as soon as the 205Ms became available I went back to them. Funny how you don't pay attention to what you just learned (or listen to an old joker like me). I'm sure Y'all have plenty of knowledge where 205s ain't as good as 205Ms but if you haven't tried both on the same day...you really don't know. I have, and know, and still don't believe it. I mean , hellfire, how could a cheaper primer be as good as a more expensive model - from the same company?