40 S&W – Underwood 165 Grain Bonded JHP

 Each Gold Dot® hollow point cavity is tuned by specific caliber and bullet weight to ensure optimum performance. We form the hollow point cavity in two stages. The first establishes how far the bullet can expand; the second controls the rate of expansion. This patented two-step cavity formation gives Speer engineers incredible control in the design process. Each bullet caliber and weight is tuned for optimum expansion and penetration.