Today I was looking at reloading data that Accurate Powders published and under the 35Whelen there were 3 - 225grain bullets by diff manufacturer's... OK, now they looked like this - numbers are roughly what I remember..
Brand A 42gn of XYZ pdr = 2400fps / 41,000 psi
Brand B 48gn of XYZ pdr = 2425fps / 49,000 psi
Brand C 48.3gr of XYZ pdr= 2440fps / 49,900 psi
Now what got my attention was the 8,000 psi it appeared they could have kept increasing pdr XYZ until it approached 49,000 range which should have gave Brand A bullet a major fps increase/advantage? So, is there a reason to stop at 41,000 psi that I am missing?
Unless case capacity was maxing, and it should not have been, considering they used the same pdr and case in each load why would this be a place to stop on load A????
Again numbers are only close memories of what I read but close enough to be fair...