JSB 546247-250 Exact Jumbo .22 5.52mm Pellets 250pk
When only the tightest fit will do, the JSB Exact Jumbo 5.52mm provides the ultimate barrel-to-pellet seal. This "over-caliber" 5.52mm head is the preferred choice for many shooters whose rifles have slightly larger bores or prefer a more snug fit to improve consistency. Available in a convenient 250-pack, these .22 pellets deliver incredible energy transfer and stability at long distances. If you’ve struggled with grouping, switching to the 5.52mm Exact Jumbo is often the "magic fix" for achieving elite-level accuracy. - George
The JSB Exact Jumbo .22 is the firm foundation of JSB's .22 calibre range - not a basic pellet, but a top-quality, highly respected choice among airgun shooters. Carefully engineered for perfect flight characteristics, these pellets offer exceptional long-range performance thanks to their optimised shape, centre of gravity and alignment. Hand-picked during quality control, each tin contains pellets that meet JSB’s exacting standards.
- Weight 1.030 g
- Diameter 5.520 mm
- Quantity 250 pcs
- Muzzle velocity 175 m/s (at 16 J)
- Tested group requirement centres within 16 mm at 45 m
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Outstanding long-distance accuracy , specifically shaped for ideal distribution and alignment, making them the best choice for longer shots.
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Hand-picked quality control , every pellet in the tin is inspected to guarantee consistency.
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Proven performance , tested at 45 m, with five-shot groups required to have centres within 16 mm.
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Consistent velocity , muzzle velocity of 175 m/s when used in an airgun set to 16 J.
- JSB 546247-250 Exact Jumbo .22 5.52mm Pellets 250pk
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Why buy a 250-pack of 5.52mm pellets? The 250-count tin is perfect for testing. Since the 5.52mm is the largest standard head size, this pack allows you to see if your rifle prefers a very tight fit without committing to a full 500-count tin.
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Will 5.52mm pellets damage my air rifle barrel? No. Because JSB pellets are made of soft lead, the 5.52mm head will safely compress to fit your barrel, providing maximum grip and spin without causing wear.
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Are these pellets suitable for FX or Daystate rifles? Many high-end rifles with "Smooth Twist" or "Liner" barrels perform exceptionally well with the 5.52mm head size, as it ensures positive engagement with the rifling.
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What is the difference between JSB Exact and JSB Straton? The Exact is domed for maximum long-range stability, whereas the Straton is pointed. For most shooters, the Exact Jumbo 5.52mm offers superior accuracy at varied distances.
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Does head size matter for pellet BC (Ballistic Coefficient)? Yes. A proper fit (like 5.52mm in a larger bore) ensures the pellet doesn't "wobble" in flight, maintaining a higher BC and a more predictable flight path.