The later Barracuda Mk II had the more powerful Merlin 32, providing a 400 hp (300 kW) increase in power. During late 1942 testing of the Mk II was performed at RAF Boscombe Down; when flown at 14,250 lb (6,477 kg) showed a climb to 10,000 ft (3048 m) in 13.6 minutes, with a maximum climb rate of 840 fpm (4.3 m/s) at 5,200 ft and an effective ceiling of 15,000 ft (4,572 m). During June 1943, further testing occurred at Boscombe Down, which demonstrated a maximum range while carrying either a 1,630 lb (750 kg) torpedo or a single 2,000 lb bomb (909 kg), of 840 statute miles (1,355 km), and a practical range of 650 statute miles (1,048 km), while carrying 6 x 250 lb (114 kg) bombs reduced the range to 780 miles (1,258 km) and 625 miles (1,008 km), respectively.