11-23-2021, 06:05 PM
Also, the interior of that case head looks... odd to me. I haven't sectioned a Grendel, and it's failure mode form may not be how it started. But I was under the impression there was typically more rounded slope at the base, where the walls merge into the case-head on the inside. This one looks a bit thin there. Normally headspace related failures occure in the middle of the case body, and there's enough base to still seal. And .223 cases are designed for that, with a bit thicker bottom 1/3 of the case or so. That Lapua Grendel case... I donno. Lapua internal case dimension nuances combined with excessive headspace from the factory, is not something I'm prepared to say was the cause - but worth a moment to confirm that the headspace is correct, if you have ability to do so.