I had a partial case head separation using a 1.8oz buffer

[lazyengineer]

Thanks grayfox. Klem posted the article earlier. The problem with it is that it is still inconclusive. And the commentator posts make sense, BUT...they are mostly only talking about the permanent deformation properties of metal and the other factor to consider are the temporary deformation properties. When an alloy gets harder and has higher yield strength, it can also get more brittle or inelastic. This is why Young's modulus and shear modulus are other important parameters in addition to hardness and yield strength. This is why I want the hard numbers of everything. Chemical composition only gives partial information.

In short, the article helps to a degree, but it still doesn't provide conclusive proof that Lapua brass is "better". Hence, that big disclaimer you quoted from it.

Yes. There is little questin Lapua brass metallurgy is great. But no case wall is strong enough to hold back 52,000 psi on its own, if there is no steel chamber there. A case head, does, every shot. Lapua runs a thinner case head, and if the chamber isn't cut quite right, appears to be the first to expose case wall and fail, we seem to see.