Setting a Duke trap correctly comes down to three things: compressing the springs safely, bedding the trap so it sits stable and level, and covering it so the target animal triggers it naturally. The exact process depends on whether you’re working with a coil-spring foothold trap or a body-grip (conibear-style) trap, so this guide covers both.
Choosing the Right Trap Size
Duke makes a wide range of trap sizes, and picking the wrong one means missed catches or unintended captures. For coil-spring foothold traps, here’s a general breakdown by target species:
- Mink and muskrat: #1 CS with a 4-inch jaw spread
- Fox and raccoon: #1½ CS with a 4.75-inch jaw spread
- Bobcat, coyote, and fox: #1¾ CS or #2 CS, with jaw spreads between 5.25 and 5.875 inches
- Beaver, coyote, and larger animals: #3 CS (6-inch jaw spread) or #4 CS (6.5-inch jaw spread)
Duke also offers offset-jaw and rubber-jaw (padded) versions in most sizes. Offset jaws leave a small gap when closed, reducing pressure on the animal’s limb. Padded jaws serve a similar purpose and are required by regulation in some states. If you’re targeting raccoons specifically, the Duke DP Coon Trap (Model 0510) uses a narrow 1.25-inch opening that selectively catches raccoons while excluding most non-target animals.
For the Pro Series line, the 450 (4.5-inch jaw spread) handles fox, raccoon, and coyote, while the 650 (6.75-inch jaw spread) is built for coyote, and the 850 (8.5-inch jaw spread) targets beaver, wolf, and mountain lion.
Setting a Coil-Spring Foothold Trap
Start by placing the trap on flat ground in front of you with the jaws open toward you. Step on one spring lever with your foot to compress it flat, then compress the other spring lever. With both springs compressed, the jaws open freely. Set the dog (the small metal latch) over the pan so it holds the jaws apart under tension. The pan is the flat plate in the center that the animal steps on. When the pan depresses under weight, the dog releases and the jaws snap shut.
Before heading to the field, test-fire your traps at home a few times. This lets you check that the pan tension is right and the dog engages smoothly. If the trap fires too easily, tighten the pan tension screw slightly. If it won’t fire under light pressure, loosen it.
Bedding the Trap
A poorly bedded trap wobbles when the animal steps on it, which spooks the animal before the trap fires. Dig a shallow hole at your set location, just deep enough to place the trap at or slightly below ground level. Drive your anchor stake (or stakes) first, then sift loose dirt into the bottom of the hole to create a smooth base. Place the set trap in the hole and press it down firmly.
Now check for wobble using the four-point system. Press down on one jaw, then the other, then one spring lever, then the other. If you feel any rocking at any of those four points, pack more dirt underneath the wobbly spot and repeat the check. Once the trap sits perfectly stable, pack dirt around the outside edges to lock it in place.
Covering the Trap
After bedding, the trap needs to be invisible. Place a pan cover (a piece of wax paper, cloth, or a commercial pan cover) over the pan to keep dirt from getting underneath it and jamming the mechanism. Then use a dirt sifter to sprinkle fine, dry soil over the entire trap until nothing is visible. The goal is a thin, even layer, roughly a quarter inch, that looks like the surrounding ground. In leaf litter environments, you can use leaves or dry grass instead of dirt, but the trap still needs a pan cover to prevent debris from packing under the pan.
Setting a Body-Grip Trap
Duke’s body-grip traps (sometimes called conibear-style traps) work differently. Instead of catching a limb, they close around the animal’s body or neck as it passes through the square frame. These are powerful traps, and setting them by hand without tools is both difficult and dangerous.
Duke strongly recommends using the Model 0965 Set Tool to compress the springs. This tool gives you the leverage to push each spring down without straining your hands. Hook the set tool onto one spring and compress it until it lies flat against the frame, then engage the safety hook to hold it in place. Repeat on the other spring. With both springs compressed and locked, the jaws open and you can set the trigger mechanism.
The Model 0963 Safety Grip Tool is equally important. Once the trap is set, this spring-loaded clamp fits around the jaws and prevents the trap from accidentally firing while you’re positioning it. You remove the safety grip only as your final step, after the trap is fully secured in position. Never carry a set body-grip trap through the woods without a safety device engaged.
Positioning Body-Grip Traps
Body-grip traps are placed in travel routes where animals pass through a confined space: a den entrance, a gap in a fence line, a run through marsh vegetation, or a channel in shallow water. The trap frame should sit perpendicular to the animal’s path so the animal walks or swims through the opening. Stabilize the trap with guide sticks, stakes, or wire so it stays upright and centered in the travel path. The trigger wires should be positioned so the animal contacts them at the center of its body as it passes through.
For water sets targeting beaver or muskrat, the trap is typically wired to a stake driven into the bottom of the stream or pond, with the frame positioned just below the water’s surface in a slide, dam crossing, or channel. For land sets targeting raccoon or similar species, the trap is often placed at a den opening or in a cubby set (a small enclosure made from logs or rocks that funnels the animal through the trap).
Anchoring Your Trap
Every trap needs to be solidly anchored. For foothold traps on land, a rebar stake driven deep into the ground is the most common method. Drive it at an angle away from the trap so an animal pulling against it only drives the stake deeper. In rocky ground where staking is difficult, a drag (a heavy object like a chunk of log attached by chain) lets the animal move a short distance but tires and tangles rather than pulling free.
For body-grip traps, the trap is usually wired directly to a tree, stake, or log near the set. The connection needs to be strong enough that the trap doesn’t get dragged out of position, since body-grip traps are designed to dispatch the animal quickly in place rather than hold it.
Preparing New Traps
Brand-new Duke traps come with a light coating of oil to prevent rust during shipping. This oil carries human scent and an industrial smell that can spook wary animals like coyotes and foxes. Before using new traps, clean them by boiling in water, sometimes with bark or walnut hulls added to darken the metal and leave a natural scent. Some trappers use commercial trap dip (a wax-based coating) after boiling, which protects against rust and reduces scent. For water trapping species like beaver and muskrat, scent control is less critical, but removing the factory oil is still good practice.
After cleaning, handle traps with clean gloves whenever possible. Latex or rubber gloves work for handling during setup, and some trappers keep a dedicated pair of leather gloves for fieldwork. Store clean traps outdoors or in a shed rather than a garage where they’ll pick up fuel and chemical odors.
Common Mistakes That Cost Catches
The most frequent error with foothold traps is poor bedding. If the trap rocks even slightly, animals feel the instability and pull their foot back before the trap fires. Take the extra minute to do the four-point wobble check every time.
Pan tension set too light is another problem. Wind-blown debris, birds, or small non-target animals can trip a trap that fires too easily. For coyote and bobcat sets, many experienced trappers adjust pan tension to around 2 to 4 pounds of pressure.
With body-grip traps, the most common mistake is placing the trigger in the wrong position. If the trigger wires sit too high or too low relative to the animal’s travel path, the animal pushes through without contacting them or turns away. Match trigger placement to the height and size of your target species. For raccoons passing through on the ground, the trigger should sit close to the bottom of the frame. For beaver swimming through an underwater set, center it in the frame where the beaver’s head and shoulders will make contact.