You can also get original paper shells (100+ years old) and load those. I’ve sold quite a few to people who hunt with them. Most replace the cap in them first but some have reported that they original caps still work fine after all these years.

They were generally all produced as new-primed empties so easy to load with whatever you need. And you can have the fun of using antique loading tools with them if wanted too.

https://AaronNewcomer.com & The Lefaucheux Museum