some pistols will shoot tighter groups with a particular bullet weight, in my experience.
Could be same model pistol & 1 prefers 115gr, another 124/5 gr., yet another 147 gr.
Have to shoot the different weights to see which your firearm prefers.
^^^same as above^^^ I mostly stay with the 147 for the closer in and sorter barrel and 124 for the farther and longer barrel. But that really no big deal. Either or. Whatever is available and most cost efficient. There I go taking in circles again.