09-27-2022, 03:55 PM
lazyengineer Wrote: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.
Agreed. And this is speculation only, but a more malleable and/or elastic brass that may not have the same hardness or yield strength as Lapua might still be "better" for this failure. Instead of the metal tearing and rupturing to create a blowout, it *might* just stretch like a balloon instead. The evidence is anecdotal only but the snipershide thread linked earlier showed pics of Hornady brass with the belt phenomena. No tearing or blowout holes. Just extremely stretched brass. Again, speculation only but maybe, just maybe, Hornady brass is easier to stretch but not tear than Lapua.