I took 130g Ballistic Tips and 130g Accubonds.

Loaded both with 4831

The Accubonds shot poorly. Four shots into a 3 inch stringing group.

The Ballistic Tips shot superbly. Four shots into a nice 1/2 inch clover leaf. Two of them into one hole.

Why such a dramatic difference?

Load for each was:

56g IMR 4831
3.330 COAL

From a 270win