If you want a less expensive bullet for practice and you currently use the Accubond why on Earth are you not using a Ballistic Tip of the same weight?
That's the logical answer if you really like the Accubond.
Use the NBT for practice, the NAB for hunting.
I do that with my .300 WM, 180 NBT and 180 NAB have the same POI, same B.C.
DF
