Are FX and JSB pellets made by the same manufacture?

FX 34gr, $15.99 a tin of 300:
 
If you want to hear an explanation from a JSB owner, watch the AEA JSB Factory Tour video, of 11/26/19, paying close attention to the "MythBusters" section at 38:00. Also, video states JSB gets most of its lead from Poland. WM
JSB gets most of its lead from Poland, WOW, that hurts and we all know why the slow down, thanks