Attaching a leader to a lead line, often specifically lead core line, is typically done using a strong, reliable knot that can handle the different diameters and materials of the two lines. One popular and effective method is using the Double Uni Knot, which is well-suited for joining lines of varying strengths and types.
Understanding Lead Core Line
Before diving into the knot, it's helpful to understand what lead core line is. Unlike standard fishing line, lead core line has a weighted lead filament running through its core, encased in a braided or nylon sheath. This construction helps the line sink quickly to target depths, making it popular for trolling. Attaching a leader is crucial because the lead core itself is often brightly colored in sections (to measure depth) and may not be as abrasion-resistant or invisible as a leader material near the lure or bait.
The Double Uni Knot Method
The Double Uni Knot is a versatile knot that creates a strong, low-profile connection between two lines. It involves tying a Uni Knot with each line around the standing part of the other line, and then drawing the two knots together.
Here's a step-by-step guide:
- Overlap the Lines: Place the end of your leader line parallel to the end of your lead core line, overlapping them by about 6-8 inches.
- Tie the First Uni Knot: Take the tag end of the leader line and form a loop over both the leader and lead core lines. Wrap the leader tag end around both lines and through the loop about 5-7 times.
- Tighten the First Knot: Moisten the wraps with saliva or water. Pull the standing line of the leader while holding the tag end to partially snug the knot. It should slide down towards the overlap point.
- Tie the Second Uni Knot: Now, take the tag end of the lead core line and form a loop over both lines in the opposite direction. Wrap the lead core tag end around both lines and through this new loop about 4-5 times (lead core sheath can be thicker, requiring fewer wraps).
- Tighten the Second Knot: Moisten these wraps. Pull the standing line of the lead core while holding its tag end to partially snug this knot. It should slide down towards the overlap point where the first knot is.
- Draw the Knots Together: This is the critical step for creating the final splice. As noted in fishing references, "Now you can snug it up... The tag ends. And pull them together they'll slide together nice and tight." Hold the standing lines of both the leader and the lead core, and simultaneously pull the two tag ends (one from the leader, one from the lead core). The two partially tightened Uni knots will slide smoothly towards each other until they meet in the middle and form a single, secure junction.
- Final Cinch: Once the knots are together, pull the standing lines firmly to fully cinch the entire connection.
- Trim Excess: Carefully trim the two tag ends close to the knot. Ensure you don't cut the standing lines.
Why the Double Uni Knot?
- Versatility: Joins lines of different types (monofilament to braid, fluorocarbon to braid, braid to lead core) and varying diameters.
- Strength: Creates a strong connection when tied correctly.
- Reliability: A popular and proven knot for joining lines.
Alternative Knots
While the Double Uni Knot is highly recommended, other knots can also be used, depending on the specific lines and angler preference. Some alternatives include:
- Blood Knot: Effective for joining lines of similar diameter, but can be tricky with significant diameter differences.
- Albright Knot or Modified Albright Knot: Good for joining lines of different diameters, particularly a thinner line to a thicker line or loop.
| Knot Type | Best For | Ease of Tying | Notes |
|---|---|---|---|
| Double Uni Knot | Joining lines of varying diameter/type | Medium | Excellent for leader to lead core. |
| Blood Knot | Joining lines of similar diameter | Medium | Less ideal for large diameter differences. |
| Albright Knot | Joining lines of dissimilar diameter | Medium | Good alternative for leader to lead core. |
Practical Tips for Success
- Practice: Practice tying the knot with scrap pieces of line before doing it on your fishing setup.
- Moisten: Always moisten the line and knot before cinching it tight. This reduces friction and prevents the line from weakening due to heat.
- Check the Knot: Visually inspect the finished knot to ensure it looks correct and the wraps are tidy.
- Trim Carefully: Use sharp scissors or clippers to trim the tag ends flush with the knot.
By following these steps, particularly mastering the technique of pulling the tag ends to slide the knots together as described in the reference, you can create a secure and effective connection between your leader and lead core line for successful fishing.
