I'm glad I stumbled in here, I think I actually managed to learn something again.
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<br>If I understand this correctly, high pressures erode, but what we perhaps did not explicitly state, is that the "over bore" cartridges have high pressure for a long(er) duration. A 308 has high pressure, same as 30-378, but is at near-max pressure (temp) for a much shorter duration than the large cap case. In other words, time x temperature are the function.
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<br>If you take the extreme temperature down, you can increase the time exposure, and still reduce erosion.
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<br>At least, that's what I think I just learned. FWIW, Dutch.
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