I have some headstamped Jamison that are .079 rim diameter and  .013 neck thickness.  My original intent was to form 44-77 from them which would give me thicker necks to use PPB in the Shiloh greaser chamber.  That didn't work due to the shallower headspace.

Recently I bought  another group of 43 stamped JBA that are .071 rim thickness and .010 neck thickness.  These will work fine in my Shiloh if I ever need them.

The crux of all this is that while Jamison offered two or three different 44-77's I sure wasn't aware of but one type of 43.