The Ultimate Guide to Copper Fishing Line: Strength, Sensitivity & When to Use It

As a seasoned angler and outdoor writer with over a decade spent exploring the waterways of the US, I’ve seen fishing line technology evolve dramatically. One material that consistently sparks curiosity – and often debate – is copper fishing line. Whether you’re hearing about copper fishing wire for its incredible strength or Blood Run copper fishing line specifically for its trolling applications, understanding its nuances is crucial. This guide will dive deep into everything you need to know about copper line, from its unique properties to when and where it truly shines. We’ll cover its advantages, disadvantages, and how it stacks up against more common options like monofilament, fluorocarbon, and braid.

What is Copper Fishing Line and Why the Buzz?

Copper fishing line isn’t new, but it’s experiencing a resurgence in popularity, particularly among Great Lakes trollers and anglers targeting deep-water species. Unlike traditional lines made from nylon, fluoropolymers, or braided polyethylene, copper line is, as the name suggests, constructed from strands of copper. This gives it a unique set of characteristics. The primary appeal lies in its density. Copper is significantly denser than water, meaning it sinks faster and stays deeper with less effort. This is a game-changer when you need to present your bait or lure at specific depths without using heavy weights.

The Science Behind the Sink Rate

The density of copper (8.96 g/cm³) compared to water (1 g/cm³) is the key. This means copper line has a much higher specific gravity, resulting in a faster and more consistent sink rate. According to REI’s Expert Advice, understanding specific gravity is vital for choosing the right line for your fishing conditions. While braid also sinks, it often requires the addition of lead core or other weighting systems to achieve the same depth as copper. This inherent weight also provides excellent trolling depth control, especially in large bodies of water.

Benefits of Using Copper Fishing Line

Let’s break down the advantages of choosing copper line for your next fishing adventure:

• Exceptional Depth Control: As mentioned, its density allows for precise depth presentation without excessive weight.
• Minimal Stretch: Copper has very little stretch, providing excellent sensitivity and allowing you to feel even subtle bites.
• Abrasion Resistance: Copper is surprisingly durable and resistant to abrasion, making it suitable for fishing around structure.
• Corrosion Resistance: Modern copper lines are often coated with a protective layer to prevent corrosion, especially in saltwater environments.
• Unique Presentation: Some anglers believe the copper color itself can be an advantage, providing a different flash or profile that attracts fish.

Drawbacks and Considerations

While copper line offers significant benefits, it’s not without its drawbacks. It’s essential to be aware of these before making the switch:

• Cost: Copper line is generally more expensive than monofilament or fluorocarbon.
• Knot Strength: Tying knots in copper line can be challenging. Specialized knots are required to maintain maximum strength. Knot Guide is an excellent resource for learning appropriate knots.
• Visibility: While some argue the color is a benefit, copper line is more visible than fluorocarbon, potentially spooking fish in clear water.
• Memory: Copper line can develop memory (coils) over time, which can affect its casting and handling. Proper storage and line management are crucial.
• Electrical Conductivity: Copper is an excellent conductor of electricity. This can be a safety concern when fishing during thunderstorms. The National Park Service strongly advises seeking shelter during electrical storms.

Types of Copper Fishing Line: Blood Run vs. Standard

You’ll primarily encounter two types of copper fishing line:

Blood Run Copper Fishing Line

Blood Run copper fishing line is a specific brand and often used as a generic term for high-quality, multi-strand copper line designed for trolling. It’s known for its exceptional strength and sensitivity, making it a favorite among salmon and trout anglers in the Great Lakes region. It’s typically available in various diameters and lengths, often pre-spooled onto trolling reels.

Standard Copper Fishing Wire

This refers to more general-purpose copper line, often sold in spools for various applications. It may be slightly less refined than Blood Run and might require more careful knot tying and handling. It’s suitable for situations where extreme depth control isn’t the primary concern, but the benefits of low stretch and abrasion resistance are desired.

When to Use Copper Fishing Line: Ideal Applications

Copper line excels in specific fishing scenarios:

• Great Lakes Trolling: This is where copper line truly shines. Its ability to get deep quickly and maintain depth is invaluable for targeting salmon, trout, and lake trout.
• Deep-Water Jigging: When fishing for bottom-dwelling species in deep water, copper line allows you to maintain contact with the bottom and feel subtle bites.
• Structure Fishing: Its abrasion resistance makes it a good choice when fishing around rocks, reefs, or other submerged structures.
• Downrigging Alternatives: Copper line can be used as an alternative to downriggers, providing a more natural presentation.
• Ice Fishing (with caution): While less common, some ice anglers use copper line for its sensitivity and strength, but be mindful of the electrical conductivity in cold, wet conditions.

Copper Line vs. Other Fishing Line Types

Let’s compare copper line to its main competitors:

Line Type	Strength	Sensitivity	Stretch	Cost	Depth Control
Copper	High	Excellent	Minimal	High	Exceptional
Monofilament	Moderate	Moderate	High	Low	Poor (requires weight)
Fluorocarbon	High	Good	Low	Moderate	Poor (requires weight)
Braided Line	Very High	Excellent	Minimal	Moderate-High	Good (often requires lead core)

Tips for Using Copper Fishing Line

Here are some best practices for maximizing your success with copper line:

1. Use Specialized Knots: The Palomar knot and the Improved Clinch knot are often recommended for copper line, but practice them thoroughly.
2. Line Conditioner: Apply a line conditioner to reduce memory and improve handling.
3. Proper Storage: Store your copper line in a cool, dry place away from direct sunlight.
4. Regular Inspection: Inspect your line regularly for abrasions or damage.
5. Consider a Line Counter: A line counter reel can help you accurately deploy your line to the desired depth.
6. Practice Safe Handling: Be aware of the electrical conductivity of copper and avoid fishing during thunderstorms. The USDA Forest Service provides excellent outdoor safety guidelines.

Leave No Trace with Copper Line

As responsible anglers, we must always prioritize environmental stewardship. When discarding used copper line, dispose of it properly. Do not leave it on shorelines or in the water. Consider recycling options if available. Adhering to the principles of Leave No Trace ensures our fishing areas remain pristine for future generations.

In conclusion, copper fishing line is a specialized tool that can be incredibly effective in the right situations. While it requires a bit more knowledge and care than traditional lines, the benefits of exceptional depth control, sensitivity, and abrasion resistance make it a worthwhile investment for serious anglers. By understanding its strengths and weaknesses, you can harness the power of copper to elevate your fishing game.