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JSB King Heavy .25 | 300 pcs | 33.95 gr
$27.99
JSB King Heavy .25 | 300 pcs | 33.95 gr
High-Performance. Long-Range. Built for .25 Cal.
The JSB Match Diabolo Exact King Heavy is a purpose-built heavyweight .25 caliber pellet engineered for high-performance airguns, long-range shooting, and hunting larger game. At 33.95 grains with a domed round-nose profile, this pellet delivers the aerodynamic performance, consistency, and downrange energy that serious .25 caliber airgunners demand — shot after shot, tin after tin.
Overview
The King Heavy is the original heavyweight king of the JSB .25 caliber lineup. The domed round-nose profile enhances aerodynamics for high-velocity performance and reliable energy transfer on impact, while JSB's famously tight manufacturing tolerances ensure consistent head diameter and weight across every pellet in the 300-count tin. Whether you're stretching distances on the range or putting pellets on larger game, the King Heavy delivers the performance its reputation demands.
Key Features
- .25 caliber heavyweight domed pellet engineered for high-performance airguns
- 33.95gr design delivers substantial downrange energy for long-range shooting and larger game hunting
- Original King Heavy skirt diameter — 6.68–6.70mm
- Domed round-nose profile enhances aerodynamics for high velocity and consistent accuracy
- 300-count tin for extended range and hunting sessions
- JSB's industry-leading manufacturing tolerances for shot-to-shot consistency
- High ballistic coefficient of 0.054 (GA) for predictable, stable long-range trajectories
King Heavy MKI vs. MKII — What's the Difference?
The only difference between the King Heavy MKI and King Heavy MKII is the skirt diameter. The original MKI skirt measures 6.68–6.70mm while the MKII measures 6.58–6.60mm — making the MKII more reliable in some rotary magazine-fed airguns. Flight characteristics and terminal performance remain the same between both versions. Note that skirt appearance may vary between production runs.
Performance Advantage
- Heavyweight 33.95gr design retains energy effectively at extended ranges for confident long-range shooting
- Ballistic coefficient of 0.054 (GA) delivers one of the flattest, most stable trajectories in the .25 caliber pellet category
- Domed profile balances aerodynamic efficiency with reliable penetration and energy transfer on impact
- JSB's tight tolerances minimize fliers and maintain consistent groups across the full tin
Specifications
| Spec | Value |
|---|---|
| Caliber | .25 (6.35mm) |
| Weight | 33.95gr |
| Shape | Domed / Round Nose |
| Head Diameter | .250" (6.35mm) |
| Skirt Diameter | 6.68–6.70mm |
| Length | 8.74mm |
| Ballistic Coefficient | 0.054 (GA) |
| Count | 300 |
| Suggested Use | Long-range shooting / Larger game hunting |
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| Caliber: | .25 |
|---|---|
| Diameter: | 6.68mm |
| Weight: | 33.95gr |
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