Agreed. I don't have any instruments to measure down there, that fast, so could go either way like you said...
One other point I want to make here is, in partial deference to Lze's stance, there is now some indication that the Lapua design could be part of the issue. Not that Lapua is bad, and not that the Odin barrel is bad, but the combo of the 2 (in the cases I see here) leads to bulges/failures down at the web/wall interface, much as Ledzep in the other thread says. If anything is to be called "bad" or "avoid this", it would be avoid the combination. O and throw in an arguably hot or overpressure load -- didn't help any that's for sure.
Thanks to the discussions in this other thread there are now some handful of cases where this phenomenon has cropped up, all (if I read these correctly) with the Lapua brass and Odin barrel. At least, more examples so the brass failure in OP's case here is not due to a single defective case (as I originally thought). Indeed there could be other instances we don't know of, but I think this is what we have before us now. In the case of the sizing dies and relative base diameters, (whether "small base die" or not), the inverse but similar occurrence takes place with narrower dies. In the example of the die too small, the upper case is squeezed and the base is not, giving a ridge. In our cases, the walls are expanded but restrained by the chamber but the bottom portion is not, thus a ridge, line or blowout.
Physical processes, mechanical processes, gas, brass and metals, etc, are if you will, agnostic, unemotional and non-discriminatory -- they expand/retain, melt, flow or whatever purely in regards to the forces and thermodynamics upon them at the time. We try to arrive at the most objective and logical cause/effect conclusions based as much as possible on observable data -- convictions and feelings and beliefs aside.
One other point I want to make here is, in partial deference to Lze's stance, there is now some indication that the Lapua design could be part of the issue. Not that Lapua is bad, and not that the Odin barrel is bad, but the combo of the 2 (in the cases I see here) leads to bulges/failures down at the web/wall interface, much as Ledzep in the other thread says. If anything is to be called "bad" or "avoid this", it would be avoid the combination. O and throw in an arguably hot or overpressure load -- didn't help any that's for sure.
Thanks to the discussions in this other thread there are now some handful of cases where this phenomenon has cropped up, all (if I read these correctly) with the Lapua brass and Odin barrel. At least, more examples so the brass failure in OP's case here is not due to a single defective case (as I originally thought). Indeed there could be other instances we don't know of, but I think this is what we have before us now. In the case of the sizing dies and relative base diameters, (whether "small base die" or not), the inverse but similar occurrence takes place with narrower dies. In the example of the die too small, the upper case is squeezed and the base is not, giving a ridge. In our cases, the walls are expanded but restrained by the chamber but the bottom portion is not, thus a ridge, line or blowout.
Physical processes, mechanical processes, gas, brass and metals, etc, are if you will, agnostic, unemotional and non-discriminatory -- they expand/retain, melt, flow or whatever purely in regards to the forces and thermodynamics upon them at the time. We try to arrive at the most objective and logical cause/effect conclusions based as much as possible on observable data -- convictions and feelings and beliefs aside.
"Down the floor, out the door, Go Brandon Go!!!!!"