In this case, I don't see where brass brand means anything. 243Win is not WSSM,, Lapua does not offer WSSM,, and cases as good as any ever made are plenty to dig out of Win reloading brass.I might be just plain stupid, but doesn’t Lapua make.243 brass. I dont see where added velocity gives any known advantages in either hunting or target applications.
I agree though that the WSSM line should have begun at 25cal, with 26 and 28.
It's capacity is not best for 22 & 24cal