Wow, nice shooting. I think you're onto something. I have IMR and Hodgdon 4350, my 30-06 likes H4350. That's a pretty stout load but my lube and boolit work OK at those speeds, just need more consistency in the powder charge. I agree that a more aggressive crimp is part of the key to this round, at least with the powders we're using. 2400 sounds about right, maybe a bit conservative.
Thanks for the tips, they're going in my load notes.