i would also agree with sniper and stubbleon this one. every brand of shells can hit in a differant place and even a differant lot number can make a big differant. many guys are happy to shoot two inch groups from box to box. butif youwant the tightest group your gun can shoot then stick with the same lot number until they are sold out. then youshouldresight with the next lot number to keep it shooting astight as possible.