I never had real good luck with H414 and 100 grain bullets. OTOH, it seems to be my go-to powder for 120s.
Funny thing with those 120s ... my rifles like either magnum primers or match primers with H414 but sucked bad with std rifle primers.
Like with everything else, theory is good but it doesn't matter as much as real world results. Who knows, the next rifle may be completely different.
Tom
