worse yet, there were 4 different 43 Spanish cartridges. the most common is the 11.15 x 58R which takes the .439 bullet. I understand the Lee and CH dies are made for this one. It is not hard to form the brass from the Spanish basic. It is harder to make it from the 348, although more economical to use 348. There was also the 43 Reformado, a 454 diameter bore. (It was an odd bell shaped case, not a typical bottleneck) then there was the 11x 57R Spanish with a .433 bullet, also used in the New England Militia rolling blo0cks and Peabody rifles. Ther was also a short carbine cartridge with a .433 bullet, the 11x48R Remington. (rather rare)
In the 1960's a bunch of Argentine Rollers that had been arsenal refinished were imported to the states along with a great deal of berdan primed black powder ammo. I still have about 50 rounds of the ammo. And 2 of the argentine rollers. Most of the other 43 Spanish rollers have worn bores. I have never been able to get the annealing quite right. With black powder and bottle neck cases, it seems they harden again after one or two shots.
Even with the Argentine sights, which are better, but not great, I could shoot two inch groups at 100yds. With better sights, who knows.