With factory ammo your more stuck with what brand load your rifle likes best vs what you'd prefer to shoot. This very discussion is what caused me to get into handloading, years ago one could buy several brands of factory ammo and find what shot the best, then just go out and buy that. Nowadays if you dont buy the whole store supply of one brand you probably wont see it again for another 2 years... or more. And youd get lucky if that box was the exact bullet you wanted to shoot.So far it's liked 180 TSX a best. I took my elk with terminal accent but after shooting more it really didn't like it. Just got a few eldx 178 to try but I really would prefer a mono if I can.
Also another note if your rifle was brand new it could also be the barrel "settled in" after about 100rds and you could be fighting that new POI or group size.