In general you're right, of course, opsoff1, but there are bullet options above 69 grains that "appear" able to be stabilized in a 1/9 twist barrel.
On a cursory look only, it appears the Miller stability breaks at around less than 1" in length projectile for stability in the 1/9 twist barrel and there are valid options above 69 grains one could use with that twist. Of course, not all are going to work and they are on the fringe of being acceptable, but they do fall within the acceptable range.
For example, a .990" 77gr bullet shows a Miller stability of 1.44 which is deemed stable, although admittedly on the edge.
Am I missing something? I've not shot anything above 69 grains yet as my distance shooting options are limited.
Edit: To be clear, I'm not just talking about "fictional" bullets. The Sierra 77 gr Matchkings are .994 and appear to be judged stable if you believe the Miller formula. I suppose experience might be different from theory. Not trying to argue with you, hoping you have some experience that says different.
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