Take some advice from a long-time Journeyman welder- propane by itself won't achieve the heat for hardening, case or through--Propane with oxygen, like the scrap yards use for rough cutting, is OK- but nothing beats acetylene and oxygen- delivery pressure and tip size, even up to a rosebud in size, is always your best call- You mentioned the hammer faces "peening"-- and light strikes on the primers-- Huglu--?/ Turkish mfg.. How about the firing pins, especially the face where the hammer face makes contact. Are the fp holes rough or out of round>Are you shooting factory new shells, or reloads? Just wondering is all. RWTF
