A picture is worth . . .
Here’s a photo that I pulled from my files. It doesn’t show all of my “22-3000” cartridges but enough of them to answer your question.
On the left is a late 1890s wildcat, the 22-20-55 Harwood Hornet. The 25-20 SS case necked to 22 caliber.
Next is one of the orginal Lovell 22-3000. The 25-20 SS case necked to 22 but with a different neck and shoulder.
Third is a 2R J.B.Smith which is the 22-3000 improved with a sharper shoulder.
Fourth is an R-2 Lovell. Same as the Smith but made from the G&H brass which, as I said is headstamped 22-3000 but is actually the R-2 configuration.
Fifth is a 22 Lovell Short Neck, 15 degree shoulder. Again, an improved 22-3000. This one made from a 25-20 SS case.
Sixth, same with a 20 degree shoulder.
Seventh, same with a 30 degree shoulder.
As I said, this is not all of them.