Your groups may be tighter with the Fed. Premium ammo, but not necessarily!! A rifle can even prefer one lot of the " exact same ammo" to another lot! You can only find this out by shooting a number of different brands in the bullet weight(s_ you may wish to use. And, when you DO find that " perfect match" of ammo to your gun, buy a case of it in the same lot number, so you don' t have to go through this same drill again too soon!! Stored in a cool dry place, metallic smokeless powder ammo will last for a lifetime.