Pellet · .177 cal · 8.44gr · Domed
JSB Match Diabolo Exact .177 8.44gr
The default .177 PCP pellet — JSB's flagship medium-weight domed pellet, sold in 4.51 and 4.52 head sizes to fine-tune for your rifle's barrel.
Image credit: Airgun Archery Fun
Quick take
The single most-recommended .177 PCP pellet in the airgun community. JSB's medium-weight 8.44gr domed pellet is the default starting point for almost any .177 PCP — 61 orders at the partner, 80% positive. Two head sizes available (4.51 / 4.52mm) so you can fine-tune for your specific barrel without changing brand or weight.
Canadian family business · Flat $17 CAD shipping
Specifications
Key specs
| Caliber | .177 (4.5mm) |
| Weight | 8.44 grains |
| Head diameter | 4.51mm and 4.52mm available |
| Design | Domed (round-nose) — the universal general-purpose shape |
| Count per tin | 500 |
| Brand / origin | JSB — Czech Republic |
| Lead alloy | Standard lead pellet, JSB proprietary alloy |
| Buyer rating | 80% positive on 61 orders |
| Stock | Only 14 left in stock at time of writing |
The Hunt & Live take
Why this pellet earns the pick
If you ask any PCP shooter “what should I shoot in my .177,” the first answer is almost always JSB Exact 8.44gr. The reasons are unglamorous but compounding: JSB has been making this exact pellet in the same dies for over a decade, the tin-to-tin consistency is the tightest in the market, and the 8.44gr weight sits in the sweet spot for the 12-20 ft-lb power range that covers almost every regulated .177 PCP.
The two head sizes (4.51 and 4.52mm) are the secret weapon. Your specific barrel will prefer one over the other by a small but measurable margin — same brand, same weight, same dies, but a tighter or looser fit in the lands. Buy a tin of each, shoot 10-shot groups, and use whichever wins. That’s how PCP shooters squeeze the last 10-15% of accuracy out of an already-good pellet.
What rifles it pairs with
- Snowpeak Lynx Gen 3 .177 — the canonical pairing; this pellet is in the sweet spot for the Lynx’s regulated 12-18 ft-lb output
- Air Venturi Avenger .177 — same power class, same answer
- Any factory-stock .177 PCP making 12-25 ft-lbs — JSB 8.44gr is the pellet to try first
- Springers and lower-power PCPs (under 10 ft-lbs) — try the lighter JSB Exact RS 7.33gr instead
When to use it / when not to
Use it for: general practice, plinking, paper at 25-50 yards, small pest control out to about 35 yards. This is the everyday .177 pellet.
Skip it for: dedicated hunting where you want energy transfer (try JSB Hades 10.34gr hollow points instead), or formal 10m bench paper (a wadcutter like JSB Match Premium does cleaner holes).
Honest trade-offs
Premium price for a reason. JSB pellets cost roughly 1.5-2× the budget options like Snowpeak or Crosman. The accuracy delta is real but only matters past ~25 yards — for backyard plinking inside that range, the cheap pellets are fine.
Out of stock cycles. This is the partner’s volume .177 pellet and it cycles through stock quickly. If the 4.52 head size you want is gone, the 4.51 is the next best thing — don’t switch brands, switch head sizes.
Always buy 500-count tins. Per-pellet cost is significantly lower in 500 vs 250. Pellets stored in original sealed tins in a dry place stay good for years.
Pillar resource · Featured
The Perfect PCP Starter Kit for Beginners
Every part. Every line item. Picked, budgeted, and linked. Snowpeak Lynx Gen 3 rifle with bundled scope, hand pump, pellets, mounts, silicone oil, fill adapter, bipod, and case — $1,200–$1,500 CAD total, every item from our Canadian partner.
Read the full starter-kit guide →In partnership with
