From my iPhone, it takes 2 seconds to retrieve every load I’ve assembled since 1995. And I can sort or search those loads using any criteria I choose. Additionally, ammunition is stored in dozens of ammo cans which are barcoded. Simply scan a can with the phone and it tells me the caliber, type, brand, weight and quantity of every cartridge contained within. Same goes for bullets, primers, powder etc. Even my trips to the range are databased. Most importantly, data backups are encrypted locally and in the cloud. Syncing between different iOS devices is completely seamless.
I can’t imagine having to use Excel again. But the option of exporting my data in either XLS, ODS or CSV format only requires 3 clicks. If a printed hard copy is desired, no problem at all.
I realize that’s there some folks that still use notebooks and may not even own a smartphone...so whatever works best for you is what you should use.