This is brand new .223 Nosler brass, unfired. The first time it happened was on my first ladder test using only new unfired Nosler brass working my way up charge weights at 26.5g powder charge 2 cases had a crack in them running lengthwise on the side of the case. So I stopped using the Nosler brass in favor of some Federal brass and starting over again worked up a load using Federal brass. I went back to some new unfired Nosler brass to see how it groups with my recipe settled at 26.2g but one of the 5 cases cracked in the same way. Meanwhile the Federal brass has been loaded 4 times now some even hotter and no signs of pressure, same for some Winchester brass.
Powder is A2520
Is Nosler brass just a weaker brass?
Powder is A2520
Is Nosler brass just a weaker brass?