all ammo can change point of aim, if you do NOT wish to shoot new ammo to see, then stick with what you know worked and was accurate enough for your liking
different brands even of the same grain, , again can change things, typically not enough to miss a deer at 100-200 yards
but every rifle will have one load/bullet/powder it likes best and will be the most accurate out of YOUR rifle
switching things you will see changes how, large or small, , only way to know is to shoot them and see!