Nosler BT .280 Ackley Improved 140gr Ballistic Tip 20/Box $71.00 $44.68 Nosler BT .280 Ackley Improved 140gr Ballistic Tip 20/Box delivers violent expansion upon impact, resulting in quick, humane kills. Nosler's BT (Ballistic Tip) bullet is tipped with a polycarbonate tip which rapidly drives back, forcing the thin... Compare Choose Options