Getting down to the last few loaded cartridges I inherited, so only a few more bullets to pull, I decided to press Ford's protocol of putting fire forming the sticks of brass in the equation. And only with 11 grains of Red Dot and a column of Grits, cracks or fissures still reveal themselves in the area of 9mm above the rim up to 25 mm above the rim. Therefore, @ this juncture, I really don't think the loaded cases are faltering under pressure but are just exacerbating the fine fissure as a result from converting the stick of raw brass to final form. Just a thought, but again the issue still could be 2 pronged.
Hochachtungsvoll,
Raimey
rse