Choosing the right shot size is one of the most important — and often misunderstood — parts of successful shooting. Whether you’re walking up partridge in Kent, sitting for duck on the estuary, or tackling a day of driven pheasant, your cartridge choice has a huge impact on both effectiveness and ethics.
With so many options on the shelf, it can be confusing to know what works best. This guide breaks down the most popular shot sizes for different game species, explains how they work, and helps you select the right combination for your next shoot.
Understanding Shot Size: The Basics
In shotgun ammunition, shot size refers to the diameter of each pellet inside the cartridge.
The smaller the number, the larger the pellet.
For example:
- No. 9 shot – very small pellets, used for close-range clays.
- No. 6 shot – medium-sized pellets, ideal for game birds like partridge or pigeon.
- No. 4 or No. 3 shot – larger pellets, often used for pheasant or duck.
- BB or No. 1 shot – very large pellets, suitable for geese or fox control.
Larger pellets carry more energy and penetrate deeper, but fewer of them fit in the cartridge. Smaller pellets give a denser pattern but lose power more quickly. Finding the balance depends on your quarry and shooting distance.
Why Shot Size Matters
The goal of ethical shooting is a clean, humane kill.
Choosing the wrong shot size — too small or too large — can cause missed opportunities, wounded birds, or unnecessary suffering.
Factors that influence your choice include:
- Target species and size
- Shooting distance
- Gun bore and choke
- Legal restrictions (especially for lead-free or steel shot zones)
Common UK Shot Sizes and Their Best Uses
Below is a simple guide to popular shot sizes and their ideal game:
| Shot Size | Common Use | Typical Range (yards) | Notes |
|---|---|---|---|
| No. 7 or 7½ | Close-range partridge, pigeon, snipe | 20–30 | Dense pattern, ideal for early-season birds |
| No. 6 | General-purpose for pheasant, pigeon, rabbit | 25–40 | Most versatile game load in the UK |
| No. 5 | Late-season pheasant, duck, crow | 30–45 | Good balance of power and pattern |
| No. 4 | Strong-flying pheasant, mallard, hare | 35–50 | Larger pellet, better penetration |
| No. 3 | Goose, fox, large wildfowl | 40–55 | Suitable for heavy game; fewer pellets per load |
| BB / No. 1 | Geese, predator control | 50+ | Maximum stopping power for large or distant targets |
Choosing the Right Shot for Each Type of Game
🐦 Pheasant
- Early season: No. 6 for birds flying lower and closer.
- Late season: No. 5 or No. 4 for stronger, higher birds.
In Kent’s rolling fields and wooded drives, these sizes ensure enough power without compromising pattern density.
🕊️ Pigeon
- Recommended: No. 6 or 7.
Fast and agile, pigeons are best tackled with a dense pattern. Lighter loads help with quicker follow-up shots during decoying sessions.
🦆 Duck
- Recommended: No. 4 or 3 (steel alternatives if shooting over water).
Mallards and teal require good energy retention at range; larger pellets maintain effectiveness beyond 35 yards.
🦢 Geese
- Recommended: No. 1 or BB.
Big, tough birds demand heavy loads and full chokes for long shots, particularly on coastal or estuary flights.
🐇 Rabbit & Hare
- Recommended: No. 6 for rabbit, No. 4 or 5 for hare.
Both are ground game, so always ensure a clear backdrop and safe line of fire before shooting.
🐦 Woodcock & Snipe
- Recommended: No. 7 or 7½.
Small, darting birds in dense cover call for lighter shot with tight, quick patterns.
Lead vs. Steel: Modern Considerations
With ongoing changes to ammunition regulations in the UK, many shooters are transitioning from lead to steel or bismuth alternatives.
Steel shot performs differently — pellets are lighter and slightly larger for equivalent performance.
When switching:
- Go one size larger (e.g. if you used No. 6 lead, choose No. 5 steel).
- Use cartridges labelled “High Performance” only in proofed guns.
- Check proof marks (e.g. fleur-de-lys for steel-ready guns).
- Keep ranges reasonable — steel loses energy faster than lead.
Responsible shooters in Kent and beyond are adapting well to this shift, proving that sustainable shooting and strong performance can go hand in hand.
Matching Shot Size to Choke
Your choke selection affects how your shot pattern spreads.
- Open chokes (Cylinder / Improved Cylinder) work best with smaller shot and close-range targets.
- Tighter chokes (Half / Full) maintain pattern density for larger shot and longer ranges.
Experiment on a pattern plate to see how your cartridges perform at different distances. Every gun and cartridge combination is slightly different — small adjustments make a big difference.