I didn't want to invest the amount of money it would take for all the calibers I shoot. Plus creating safe storage space for all the components.
Easier to find good deals on ammo for the range and still find good deals on HD ammo to keep stocked up on. HD ammo only gets used occasionally.
Everyone in the family loves shooting .22LR and last time I checked I had over 6K rounds on hand for that. If we go out for a range day we'll burn thru
1K rounds of it. Easy to replace. And only a small amount of any other caliber. Also easy to replace and keep my stockpile up.