JSB Exact King Heavy MKII 6.35 mm Pellets, 300 pcs (546498-300)

Diabolo Exact King Heavy MKII .25 is the first Exact pellet from JSB in the 6.35 mm caliber. It was designed for high-powered air rifles — a heavy pellet with a narrower skirt (measuring 6.58–6.60 mm), which allows it to fit all loading ports. The narrower skirt allows the MKII version to work better with certain barrels and magazines (e.g., rotary ones), resulting in improved consistency and reduced deformation of the ammunition. The pellet’s weight has been perfectly matched to rifles producing over 16 J, making it an excellent choice for FAC airguns (without energy limits). Its optimized mass ensures a stable flight path both at 50+ J and in the most powerful setups reaching 70+ J.

Precisely made and hand-selected, ensuring high quality, minimal spread, and excellent shot consistency at medium and long distances. Approximate muzzle velocities: 145 m/s for rifles with 16–17 J of energy, 250 m/s for airguns producing 50 J, and 295 m/s for setups reaching 70 J. The optimal Ballistic Coefficient (BC): 0.046, means that the pellet has good aerodynamics, which allows it to lose speed more slowly, retain energy better, maintain a flatter trajectory, and be less affected by wind. Ideal for long-distance shooting.

Exact King – thanks to its perfectly balanced center of gravity, specially designed shape, and optimal weight, this pellet provides exceptional flight stability and outstanding precision in rifles with power above 16 J. Carefully engineered, precisely manufactured, and subjected to rigorous quality control, it ensures excellent shot-to-shot consistency and superb accuracy. Its stable aerodynamics and low sensitivity to barrel type allow the Exact King to maintain accuracy even at distances beyond 100 meters.

Technical Specification:
Product number: 546498-300
Name: Diabolo Exact King Heavy MK II .25

Caliber: 6.35 mm/ .25
Weight: 2.20 g / 33.95 gr
Ballistic coefficient: 0.046
Packaging: 300 pcs

Shape: Round
Chalice (skirt): Smooth
Material: Lead

Brand: JSB
Producer: JSB Match Diabolo a.s.
Country of origin: Czech Republic

Developed by: Sharg®