In .30 Cal, the 180gr NBT is fine for everything unless you are using at 300 RUM. Then you might choose to move to the AB's, either the 180's or 200's, and once again call it good for everything.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell