The 110 and 120 TTSX black tip bullets are of the "softer" design meant for the 300 Blackout. They work absolutely great when run at high speeds also. IMO, they are the way that a mono should be designed.
The 150 grain TTSX loaded in factory Vortex ammo in 308 and 30-06 of recent vintage is a softer design also that will open up better at lower velocity; however, it does not seem to open widely like the black tip bullets do.
