Regrettably, there’s no definitive answer to that question, especially in the middle grade grade lines. Lot to lot variations will drive you nuts at times. Those who really need consistent performance will get some ammo from a source that lists lot numbers and then buy a bunch of a good lot, but I don’t see a 457 as deserving of that.
Pick up some of the stuff suggested here, then buy a few bricks of those that do well, then shoot them up learning your setup and working on your technique, especially dealing with wind. Once you have that down you can refine your ammo selection and see what you can do and if it will let you be competitive in those matches.
