Absolutely agree with the advice to buy the Lapua small primer brass - it hurts to buy them but they are superb value for money!
My first batch of brass has been fired up to 11 times and is looking fine.
It should also be noted that they just don't grow in length that much at all. Giving them a tickle with the VLD deburring tool seems to keep everything in check. When I got to 8 firings I squared up the case mouths a tiny bit as I think the Lee collet die I use had caused the tiniest amount of small ridges. In fairness it wasn't causing issues, I just wanted them tidy. Not a single case had reached the 1.910" trim-to length at all...
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