OB Ballistics Experts...Switching Ammo

That's a tough question, the velocity/bullet type change could create bullet drop differences. I can't imagine that the poi would change very much horizontally. My guess would be it will be within 1-2" of the previous ammo's point of impact. I'm guessing it will hit high when compared to the SuperX.

The .264 is a damn hot round with the 140 gr. Why change?

The nosler ballistic tip was horrible in my .270 I shot 4 deer with it. I was lucky to find the deer, did a lot damage at entry but no exit and blood clotted the whole side the deer I lost lot of meat. But the worst problem was no exit hole so no blood. One doe I shot in the neck so that was no problem but I shot 3 bucks broadside behind the should and all 3 times the bullet made a right turn went through guys and had pieces of bullets in hindquarters and in the foot. After the third time this happened I changed bullets. It left zero blood trail each time I just happened I walk up on the deer.