- Location
- Nova Scotia
If you get a calculated SG value that is numerically low (like 4) that might mean you have trapped bubble inside the case. I didn't have that problem because my test case had a gaping hole in one side from an earlier sectioning.
The test should work fine with any cases (North American or European). I would guess that the European ones will have a lower SG - meaning proportionally more Zinc and less Copper - which is good.
Redid the test and made sure no air bubbles and same results. But you would need a virgin case that did not have a explosion that caused some hardening (if quenched into snow or water from being ejected ) or full of impurities that reacted with the metal or corrosion from dampness. Too many factors.
But it's not a big deal to me, as I have surplus of brass.