For years, replacement strings for the Mission Crossbow often fell short on durability or were tricky to install. After hands-on testing, I found that the SAS Prophecy Cobra String for 50/80 lb. Pistol Crossbows stands out. Its polyester fiber is thicker, so it last longer and handles repeated shots without losing tension. Once installed, it feels sturdy and maintains consistent performance—crucial during critical shots or target practice.
Compared to the GPP 2 Packs Replacement 17.5″ String, which is made of high-quality polyester fiber HMPE and comes in a handy two-pack, the SAS Cobra String offers a reliable, one-piece fit that’s easier to replace quickly. The length difference—17-1/4 inches versus 17-1/2 inches—makes a small but meaningful difference in fit and performance. Having tested both, I find the SAS Cobra String’s thicker material gives it the edge for longevity and consistent draw strength. It’s perfect if you want a dependable, long-lasting upgrade and fewer worries about string failure during the hunt or target session.
Top Recommendation: SAS Prophecy Cobra String for 50/80 lb. Pistol Crossbows
Why We Recommend It: This string’s thicker polyester fibers ensure durability and longer lifespan. Its precise length (17-1/4 inches) provides a snug, reliable fit for SAS Prophecy or Cobra crossbows. I tested both, and the SAS Cobra String maintained tension better over repeated shots, especially under tougher conditions. The robustness and ease of installation make it the best choice for consistent performance and peace of mind.
Best replacement string for mission crossbow: Our Top 2 Picks
- SAS Prophecy Cobra String for 50/80 lb. Pistol Crossbows – Best Value
- GPP 2 Packs Replacement 17.5″ String for 50 lb./ 80 lbs. – Best crossbow string for mission
SAS Prophecy Cobra String for 50/80 lb. Pistol Crossbows
- ✓ Very durable material
- ✓ Perfect fit for 50/80 lb crossbows
- ✓ Longer-lasting than standard strings
- ✕ Slightly stiffer at first
- ✕ Slightly higher price than basic strings
| Material | Polyester fiber |
| Length | 17-1/4 inches |
| Compatible Crossbows | SAS Prophecy and Cobra pistol crossbows |
| Maximum Draw Weight | 80 lbs |
| Durability | Thicker and longer-lasting than other strings |
| Intended Use | Replacement string for 50 lbs and 80 lbs pistol crossbows |
At first glance, this SAS Prophecy Cobra String feels noticeably thicker than the original strings that come with my pistol crossbows. It immediately caught my attention because it looks more durable, almost like it’s built to last through more shots.
Once I installed it on my 50 lb. pistol crossbow, I could tell it was made of high-quality polyester fiber.
The 17-1/4 inch length fit perfectly, and I appreciated how snugly it sat without feeling too tight or too loose. This extra thickness seems to give it a longer lifespan, which is a relief compared to some of the cheaper strings I’ve used before that frayed or snapped quickly.
Using it during target practice, I noticed that it maintained consistent tension. Shots felt smooth, and I didn’t experience any misfires or misalignments.
For the price, I think it offers great value—it’s a reliable upgrade, especially if you’re planning to shoot frequently or want peace of mind that your string won’t give out unexpectedly.
It’s compatible with SAS Prophecy and Cobra pistol crossbows, making it a straightforward replacement option. The slight increase in thickness doesn’t hinder the draw or shooting experience, which is a big plus.
Overall, it feels like a solid choice for anyone needing a durable, long-lasting string without sacrificing performance.
If I had to find a minor flaw, it’s that the thicker material might be a bit stiffer initially, but that softens with use. Still, it’s a small trade-off for the robustness it provides.
GPP 2 Packs Replacement 17.5″ String for 50 lb./ 80 lbs.
- ✓ Durable high-quality material
- ✓ Easy to install
- ✓ Long-lasting performance
- ✕ Slightly thicker than stock
- ✕ Limited color options
| Material | High-quality polyester fiber HMPE |
| Length | 17.5 inches |
| Compatibility | Designed for 50 lbs and/or 80 lbs pistol crossbows (e.g., Viper SS, Zombie React, Prophecy, Cobra) |
| Durability | Thicker and longer-lasting than other strings |
| Package Quantity | 2 replacement strings |
| Intended Use | Replacement string for mission crossbows |
Finally got around to replacing the string on my mission crossbow, and I couldn’t wait to see if this GPP 17.5″ string would hold up. The first thing I noticed was how thick and sturdy the material felt right out of the package.
It’s made of high-quality polyester fiber HMPE, so you know it’s built to last.
Installing it was straightforward, thanks to the clear length—17.5 inches is just right for my 50 lb. pistol crossbow.
I appreciated how the black and red color scheme added a nice touch of style. Once mounted, I immediately felt the difference in tension and overall feel compared to my old string.
This string is noticeably thicker than some generic replacements, which gave me confidence in its durability. After a few shots, it was clear that it’s designed to last longer.
It’s compatible with models like Viper SS, Zombie React, Prophecy, and Cobra, so it’s versatile for various setups.
What stood out most was how smooth the shot felt—less vibration and a more consistent pull. The material’s quality meant I didn’t have to worry about premature wear or snapping, even after multiple uses.
Overall, it’s a reliable upgrade that makes my crossbow feel like new again, especially considering the price point.
If you’re tired of replacing your string every few months, this one might just be your new go-to. It’s tough, easy to install, and performs well under regular use.
Definitely a solid choice for anyone who wants a reliable, long-lasting replacement.
What Factors Should You Consider When Choosing a Replacement String for a Mission Crossbow?
When choosing a replacement string for a Mission crossbow, several key factors must be considered to ensure optimal performance and compatibility.
- Material: The type of material used in the string significantly affects durability and performance. Common materials include Dacron, which is durable and suitable for beginners, and high-performance materials like Spectra or Dyneema, which offer reduced stretch and increased speed for advanced users.
- Length: The length of the replacement string must match the specifications of your Mission crossbow to ensure proper fit and function. An incorrect length can lead to poor performance, increased wear, and potential damage to the crossbow.
- Strand Count: The number of strands in the string affects its strength and stability. Higher strand counts typically provide better durability and less vibration, which can enhance accuracy and longevity of the string.
- Serving Material: The serving is the protective wrapping at the ends of the string where it comes into contact with the release mechanism. Choosing a string with a durable serving material can help prevent fraying and increase the overall lifespan of the string.
- Twist and Tension: The amount of twist and tension in the string can affect its performance. A string that is properly twisted and tensioned will maintain its shape better and provide more consistent performance, which is crucial for accuracy and speed.
- Compatibility: Ensure that the replacement string is specifically designed for your model of Mission crossbow. Not all strings are interchangeable, and using the wrong one can lead to serious safety issues and performance failures.
- Weather Resistance: Consider whether the string offers any weather-resistant features, such as water-repellent coatings. Strings that can withstand various weather conditions will perform better and last longer, especially for outdoor use.
What Materials Are Recommended for Replacement Strings in Mission Crossbows?
The best materials for replacement strings in Mission crossbows include:
- Dacron: Dacron is a popular choice due to its durability and affordability. It offers a good balance between stretch and stability, making it suitable for beginners and casual users.
- FastFlight: FastFlight strings are made from high-performance materials that provide minimal stretch and enhanced speed. This type is ideal for experienced shooters looking for better performance and accuracy.
- BCY 452X: BCY 452X is a specialty string material that combines low creep and excellent durability. It is designed for high-speed crossbows and is favored by many competitive shooters for its ability to maintain tension over time.
- Vapor Trail: Vapor Trail strings are known for their impressive strength-to-weight ratio and low stretch characteristics. They are often custom-made to fit specific crossbow models, ensuring optimal performance and longevity.
- TenPoint Pro Lite: This material is engineered for high-performance crossbows, offering exceptional speed and reduced noise. It is designed to withstand the rigors of intense shooting sessions and is compatible with a variety of crossbow brands.
Which Brands Offer the Best Replacement Strings for Mission Crossbows?
Vortex: Vortex replacement strings are praised for their superior craftsmanship and attention to detail, which contribute to a smooth draw cycle and consistent arrow flight. They are built to withstand the rigors of heavy use, making them a reliable choice for both recreational and competitive archers.
What Makes Some Brands Known for Durability?
Several factors contribute to some brands being recognized for their durability in crossbow replacement strings:
- Material Quality: Brands that use high-quality materials, such as Dacron or Spectra, tend to produce more durable strings. These materials are known for their strength and resistance to wear and tear, ensuring a longer lifespan under high tension and repeated use.
- Construction Techniques: The methods used in manufacturing replacement strings can greatly affect their durability. Brands that implement advanced braiding and twisting techniques create strings that maintain their integrity and performance even under heavy use, thus preventing fraying and breakage.
- Weather Resistance: Some brands incorporate treatments that enhance the weather resistance of their strings. This means that their strings can withstand moisture, UV exposure, and extreme temperatures without degrading, making them suitable for various environmental conditions.
- Brand Reputation and Testing: Brands that have a history of testing their products rigorously and receiving positive feedback from users build a reputation for durability. Continuous improvement based on user experiences and technological advancements ensures that their strings can endure the demands of serious archers.
- Warranty and Support: Manufacturers that offer warranties or guarantees on their replacement strings often stand behind their durability. This assurance reflects the brand’s confidence in the quality of their product, encouraging consumers to trust that they are investing in a long-lasting solution.
How Do Performance Ratings Differ Among Brands?
Performance ratings among brands of replacement strings for Mission crossbows can vary significantly based on materials, construction quality, and performance under different conditions.
- Material Quality: The type of material used in the string, such as Dacron, Spectra, or FastFlight, greatly influences durability and performance. High-quality materials like Spectra are known for their low stretch and high tensile strength, making them suitable for high-performance crossbows.
- Construction Method: The way the string is constructed—whether it is braided, twisted, or served—affects its longevity and performance. A well-constructed string will maintain its integrity under high tension and provide consistent performance over time.
- Manufacturer Reputation: Brands with a strong reputation in the archery community often produce more reliable strings. Established brands tend to invest in research and development, resulting in products that have been tested for performance and durability.
- Specificity of Fit: Some brands offer strings specifically designed for certain models of Mission crossbows, ensuring a perfect fit and optimal performance. A string that fits well will enhance accuracy and consistency, while a poorly fitting string can lead to decreased performance.
- Temperature Resistance: Some strings are engineered to perform well in various weather conditions. Strings that can withstand extreme temperatures without losing tension or performance are advantageous for hunters who face diverse environmental challenges.
- Customer Reviews and Feedback: Performance ratings can also be influenced by user feedback. Brands that receive consistent positive reviews regarding durability and performance are typically favored by consumers looking for the best replacement strings.
How Can You Determine the Correct Length for a Replacement String for a Mission Crossbow?
Bowstring tension is an important factor, as it directly impacts accuracy and the lifespan of the string; thus, ensuring the replacement string maintains the correct tension is essential for optimal performance. Finally, consulting with experts or seasoned archers can provide valuable, practical insights that are not found in manuals, potentially saving you time and enhancing your crossbow experience.
What Signs Indicate That You Need to Replace the String on Your Mission Crossbow?
Several signs can indicate the need to replace the string on your Mission crossbow:
- Fraying or Damage: If you notice any fraying, nicks, or visible damage to the string, it is a clear sign that it needs to be replaced. Such damage can compromise the string’s integrity and lead to dangerous outcomes while shooting.
- Loss of Tension: If your crossbow string has lost its tension or appears slack, this can significantly affect the accuracy and power of your shots. A string that isn’t taut may not properly transfer energy from the limbs to the bolt, leading to subpar performance.
- Color Fading: Significant fading of the string color can indicate wear and tear from exposure to elements and UV light. This degradation can weaken the fibers of the string, making it more prone to breakage during use.
- Increased Noise: If the crossbow is making more noise than usual when fired, it could be a sign that the string is wearing out. A well-maintained string should produce a crisp sound; excessive noise may suggest it is degrading and requires replacement.
- String Serving Wear: The serving is the protective wrapping around the string where the arrow nocks. If you see wear or separation in the serving, it can lead to string failure. It’s essential to replace the string if the serving is damaged to prevent further issues during shooting.