Here's the scenario... I can load and eject full Federal rounds all day long, but spent rounds don't eject hardly at all and when I pry the brass out it seems like its expanded enough to cause what I think is more than normal friction. If I use CCI ammo I have no issues. My thought is, is that the Federals are thinner walled and my barrel hasn't worn in enough (200ish rounds) to allow for any cartridge expansion. Does this sound viable, anybody else have the same problem, should I contact Marlin?