@OP,

I prefer to shoot my reloads, but IFF (if and only if) my supply of reloads are very low or I don't have enough cast bullets, I will purchase factory ammo. My purchase is influenced by the brass that I prefer to reload.

For:
38s: my preference is Remington, followed by Federal (or American Eagle), Winchester, then Speer.
9mm: I prefer Remington.
45s: my preference is Federal, followed by Remington, then Winchester.

I don't really "plink", but practice for matches, so I don't buy just any ammo. For my magnums, due to muscular-skeletal injuries, I shoot only my reloads. For self defense ammo, I have an assortment of ammo: Critical Defense, Silvertips, Black Talon, and Golden Sabers. For 45 self defense, I rely on hardball.

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Judge control not gun control!