Defective or damaged primers?

[bfalcon00]

I got the classic ball powder in low temps with AA #9 in 10mm. The loads worked just fine in cold temps with CCI LPP. Switched to ginex SPP and had no problems in 70 F weather. But I got a projectile stuck halfway down the barrel with the yellow clump of half burnt powder behind the bullet at 40 F.

My biggest mistake was not taking a picture of it. I would love to have it just for the story

 

[doubleh]

The OP's problem is apparently a low powder charge. The bullets made it well into the barrel and no unburned powder was found. If the cartridge fired the primer was good. I would lay the blame on the choice of powder scale. Of course not having been there and witnessed the event makes my thoughts just a WA guess.

Although not as quick, technically, as an electronic scale, something tried and true like an RCBS (Ohaus) 5-0-5 scale is, IMHO, more accurate, and once you get the hang of it, just as fast. I prefer the older ones, I think the newer ones are made in China, or have been superceded by a different version. I have had others... the Lee, and the Hornady, but those are gone, and my trusty 5-0-5 remains. With dippers and a trickler, you can safely whip out a tray of charged cases lickety-split.

That's the 5-0-5 behind the loading block. I've already charged those cases... the trickle and powder have been put away (one process at a time...) but you can see the Lee dippers laying there...

That 5-0-5 is 39 years old...

I use that same scale. I don't know exactly how old it is but my son was a teenager when I bought it and he will be 64 years old next month. I have had to clean the bearing surfaces a couple of times during it's life. It does not sit uncovered except when in use. I use two 50 round loading trays, empties in one and when charged moved to the second. I have a very bright led overhead shop light that allows me to look into each charged case during the move to see where the top of the powder charge is. Before the led light it was a desk lamp used for light. The led light is much better as it gives more light and is not in my way at all.

 

[Charlie98]

I had my doubts about my 5-0-5... so I spent the money on a check weight set last month. After 39 years... years of use and abuse, moves, poor storage... it still zeros absolutely. I wouldn't say the money I spent on the check weights was wasted... because Trust, but Verify.

 

[Alfred Mitchell]

Load long enough and enough volume ,you will have a squib once in a blue moon for a lot of reasons. We old USPSA or other competitors always have a squib rod in our range bag. No big deal, if one does not sound right ,check your barrel( if at a match ,you sacrifice the stage). It is rare but I have had it happen as I load almost exclusively on progressive equipment and it is my fault I am sure. It is called being human.