Lots of folks rolled their own in those days though factory shells were available.
And it was both, there were big companies loading but also gun stores and other proprietary loaders as well. I've got lots of stuff in my collection loaded in cases from the big companies but the overshot card shows it was loaded by somebody else.
My best one is a french pinfire case with an overshot card from a sporting goods outfit in New York. Only American (semi-factory) loaded pinfire shell I've ever heard of.
DLH
