Every rifle is different ,but I've found the Hornady Custom and Federal TBBC and N.P.'s to be the the best out of the box accuracy from box to box and haven't found Win. and Rem. to be as consistent.
If I do my part they'll give me 1/8 to 1/4 inch groups at 100yards out of my Rem. 700. Even if I get a flyer the goup will be only 3/4" with the Hornady and Federal and that flyer isn't the ammo's fault.