So as a follow on to my previous post, the Dillon Powder die gave an alarm of an over charged case on case 61.
Removing the case from press the powder level visually appeared high. I tapped and vibrated case thinking powder might settle, but it didn’t. I dumped and reweighed powder and it was spot on.
I put powder back in case and it looked high and again powder check die alarmed high. I dumped powder back on scale, it checked good. I put powder charge in a different case, it visually looked right and powder die checked good.
I repeated the above three more times. That one case had the same problem every time. While doing this I inspected inside of case and nothing was apparent. Measured exterior of case nothing notable. I weighed case, and it not out of norm for 10 other cases I weighed. I used two cases that weighed the same or more in the repeat tests above.
At this point I have isolated the case for further study. What is known about this lot of 100 pieces of brass. They are all once fired Hornady factory ammo. All 147 grain ELD match, from five boxes of the same lot that I purchased at the same time. All were shot from the same rifle, and not used in a match where I might have someones else’s brass. The possibility that in range practice ( where shells are ejected on ground) I picked up a piece of random brass exists. It is low probability, but not zero.
tis a puzzlement. Next step is to fire up the borescope and closely inspect interior of case. Not tonight though