How can you stabilize more as it goes transonic?
You start the bullet out more stable. For example, 3 guys were shooting 308 Win bolt guns running 175 SMK ammo. One was shooting a short stubby 14" barrel with an 8" twist. The other 2 were shooting regular 308 Win with like 18" and 20" barrels, 10" twist and 11.25" twist. They were shooting all the way out to 1350 yards. The shooter shooting the 14" bolt gun with the 8" twist was getting repeatable hits where the other 2 shooters were not getting hardly any, and were much farther off target. So, how would a 14" barrel launching a 175 SMK at a much slower speed be able to do this... twist rate. The 8" twist stabilizes the 175 SMK better through the transonic than the 10" and 11.25 twist, even though they were going faster.
Also, when you shoot into the transonic, Litz has calculated you need a stability factor of 2.0 (at this time of flight, not a 2.0 muzzle stability) to help maintain good stability through the transonic. And even then it's not guaranteed. There was a lot of discussion on this topic, and the simple answer is to shoot it and see. Then you will know. He talks about this in his custom drag modeling of the BC of the bullets. I'm building a 300WM necked down to shoot the 195 Hybrid and using an 8" twist, which he said should work fine (should!!). So we will see!