JSB Diabolo Exact Jumbo Heavy.22 Cal - Heavy 18.13 gr Pellets

In this review the JSB Diabolo Exact Jumbo Heavy.22 Cal pellets are evaluated for shooters who need consistent heavy pellets for field target, hunting small game or powerful spring rifles. The bottom line is simple: these 18.13 grain, 5.52mm head domed pellets deliver noticeable downrange stability and are valued for their weight and appearance, though a minority report deformities in some batches. This review focuses on real-world accuracy, build quality impressions and which shooters will get the most from these 250-count tins.

Key Features

• .22 caliber 5.52mm head: The precise 5.52mm head diameter helps achieve consistent seating and predictable barrel fit for many.22 rifles.
• 18.13 grain weight: The heavier 18.13 gr profile improves momentum and resists wind drift better than lighter pellets at typical airgun ranges.
• Domed shape: The domed design promotes stable flight and retained energy for both target and hunting use.
• 250 count tin: The 250-piece supply gives a long testing run or a season of shooting before repurchase is necessary.
• Noted aesthetic finish: Many users like the pellets' appearance, which often correlates with uniform manufacturing and easy loading.

Who It's For

These pellets are best for informed airgun shooters using.22 caliber rifles who want heavier projectiles for improved downrange stability and impact. They suit field target competitors, small game hunters and owners of medium to high power spring and PCP rifles who prefer a domed heavy pellet for retained energy.

Shooters who demand perfect consistency every tin should weigh batch quality carefully; several buyers reported some deformed pellets, so those needing absolute uniformity for extreme precision testing may want to inspect tins on receipt or consider alternative lots if deformities appear.

Pros & Cons

Pros

• Excellent retained momentum from the 18.13 gr weight, helping with wind resistance.
• Domed profile gives stable flight and good terminal performance for small game.
• 250 count packaging delivers good value for shooters who go through pellets quickly.
• Many users praise the pellet look and perceived manufacturing quality.

Cons

• Some customers report deformed pellets in certain tins, so batch variation can be an issue.
• Heavy pellet velocity may fall below the sound barrier in some setups, which can require rifle-specific tuning.

Specifications

Brand	JSB
Caliber	.22 (5.52mm head)
Weight	18.13 grains
Shape	Domed
Count	250 pellets
Intended use	Target, field target, small game hunting

Our Verdict

The JSB Diabolo Exact Jumbo Heavy.22 Cal pellets represent a strong choice for shooters who prioritize momentum and stability over peak velocity; the 18.13 gr domed pellets perform well in many rifles and offer good value in a 250 pack. Buyers should inspect tins for occasional deformities, but for most practical hunting and target uses these pellets are a worthwhile, cost-effective option.

Frequently Asked Questions

Are these pellets suitable for hunting small game?
Yes, the heavier 18.13 gr domed profile retains energy well and is suitable for small game when paired with an appropriate-powered air rifle.

Will these pellets be subsonic?
They can be subsonic depending on the rifle and powerplant; some customers noted they stay below the sound barrier in certain setups.

Do tins include damaged pellets?
Most tins are fine, but several buyers reported occasional deformed pellets, so inspect the tin on arrival and reject batches with obvious damage.