Best Gauges for Hunting Long-tailed Duck: Comparisons & Picks
Dial in the right shotgun gauge for open-water sea ducks.
Choosing the right long-tailed duck hunting gauges matters when you’re shooting over big water, in wind, and at moving birds. Below we compare popular shotgun gauges for sea-duck spreads and typical 30–45 yard shots, with an emphasis on non-toxic loads (steel, bismuth, or denser shot) and ethical ranges. Always verify local regulations—waterfowl ammo must be non-toxic in the U.S.
Caliber Comparisons
| Feature | 12 Gauge | 20 Gauge | 10 Gauge | 16 Gauge | 28 Gauge |
|---|---|---|---|---|---|
| Recoil How much kick you can expect when firing. |
Moderate (heavy loads can feel high) | Low–Moderate | High | Moderate | Very Low |
| Effective Range The distance at which the caliber remains accurate and lethal. |
40–50 yards with quality non-toxic loads | 30–40 yards (bismuth/denser shot extends to ~40) | 45–55 yards with heavy payloads | 35–40 yards (best with bismuth) | 25–35 yards (best with TSS/bismuth) |
| Bullet Weight Range The range of bullet weights typically available for the caliber. |
1–1⅝ oz steel; 1¼–1¾ oz bismuth/denser | ⅞–1¼ oz steel/bismuth | 1⅝–2¼ oz steel/bismuth | 1–1⅜ oz, limited waterfowl choices | ¾–1 oz (waterfowl options limited) |
| Versatility How well the caliber performs for other game species besides fallow deer. |
Excellent: upland, waterfowl, turkey, clays | Good: upland/light waterfowl, youth-friendly | Niche: geese/sea ducks, blinds/boats | Good for upland; moderate waterfowl utility | Specialized: upland/small game; select waterfowl |
| Ammo Availability How easy it is to find ammunition for the caliber. |
Common | Common | Moderate (fewer SKUs) | Niche | Moderate–Niche |
12 Gauge
The all-around choice for long-tailed ducks: broad ammo selection, 3″ and 3½” shells, and patterns that hold in wind. Ideal for 30–50 yard shots over big decoy spreads from layouts or boats.
Pros
- Widest non-toxic load selection (steel #2–BB, bismuth #3–#1, denser BB)
- Strong pattern density at sea-duck ranges
- Guns and chokes readily available; easy to find parts
- Works across species (divers, dabblers, geese)
Cons
- Heavier recoil with magnum 3½” loads
- Shot cost rises with premium bismuth/denser pellets
- Heavier guns can be cumbersome in rocking boats
Interesting Fact: Many modern 12-gauges are tuned to pattern steel well with modified chokes; full chokes may be too tight with some steel loads—always pattern your setup.
Consider this Caliber If…
You want maximum flexibility, consistent kills in wind, and easy ammo sourcing for sea-duck trips in coastal conditions.
20 Gauge
Light, quick-handling, and capable with modern bismuth or denser-than-lead shot. Best where shots are controlled inside ~40 yards and you value less recoil.
Pros
- Lighter guns; easier to manage in layouts
- Milder recoil encourages better follow-through
- Bismuth and premium loads pattern impressively
Cons
- Steel payloads are smaller; pattern density drops past ~35–40 yards
- Fewer heavy sea-duck SKUs compared to 12 ga
- Wind drift affects smaller shot columns sooner
Interesting Fact: Many 20-ga sea-duck hunters prefer bismuth #3–#2 to maintain energy at the edge of 40 yards without harsh recoil.
Consider this Caliber If…
You prioritize lighter recoil and gun weight, keep shots conservative, and plan to run higher-density non-toxic shot.
10 Gauge
A heavyweight specialist that shines for long, windy shots on open water. Big payloads keep patterns dense at extended ranges, at the cost of recoil and gun weight.
Pros
- Largest non-toxic payloads for excellent pattern density
- Performs well in wind and at 45–55 yards (ethical limits apply)
- Ideal from stable blinds or larger boats
Cons
- High recoil; heavier, bulkier shotguns
- Ammunition selection is limited and costly
- Overkill for many in-tight decoy shots
Interesting Fact: The 10-gauge once dominated market hunting; today it’s a niche but potent tool for sea ducks and geese where legal.
Consider this Caliber If…
You routinely face stiff winds, longer shots, and hunt from setups where a heavy gun is manageable.
16 Gauge
A classic upland gauge that can do sea-duck duty with the right loads, though waterfowl offerings are limited. Best for moderate ranges and calm days.
Pros
- Balanced handling with moderate recoil
- Effective with quality bismuth at 30–40 yards
- Appeals to hunters who love traditional guns
Cons
- Niche ammo market; fewer waterfowl SKUs
- Less forgiving in wind than 12/10 ga
- Steel options are limited and lighter
Interesting Fact: Many vintage 16-ga guns are not rated for steel; bismuth is often recommended—always confirm the barrel/choke markings.
Consider this Caliber If…
You favor classic guns, plan calm-day hunts, and can source bismuth loads to keep patterns lethal on sea ducks.
28 Gauge
Ultra-light recoil and lively handling. With dense shot types (e.g., TSS or bismuth), it can humanely take long-tailed ducks at conservative distances.
Pros
- Very low recoil; quick to mount and swing
- Surprisingly effective with high-density pellets
- Great for hunters sensitive to recoil
Cons
- Limited sea-duck loads; expensive premium ammo
- Smaller payloads reduce pattern margin at range
- Narrow effective window (~25–35 yards)
Interesting Fact: The 28-ga has surged in popularity thanks to modern high-density shot; pattern testing is critical to avoid cripples on the water.
Consider this Caliber If…
You keep shots tight over the decoys, want minimal recoil, and will invest in premium non-toxic loads.
Final Thoughts & Ethical Picks
For most sea-duck hunts, the 12-gauge is the most practical balance of payload, patterns, and availability. The 10-gauge is a specialized tool for windy, wide-open days and longer shots from stable platforms. If you want lighter recoil and keep shots honest, the 20-gauge with quality bismuth is extremely effective. The 16- and 28-gauges can both work in the right hands with premium loads and conservative ranges. No matter what you choose, pattern your gun with your intended choke and non-toxic load, know your effective range, and prioritize clean, ethical kills. Check all local regulations before heading out.