TheUmarex Power Ton 4.5/400 is a heavy semicircular shotgun shell with high knockdown power, which will be perfect for HFT shooting.
The smooth semicircular head and heavy weight, make the shot, even to travel a considerable distance, retain high knockdown power and accuracy. Mushroom-shot can be used for long-distance shooting to bring down reactive targets used, among others, in the popular HFT competition.
