
Description
The Heavy Metal Worm, designed by Andrew Grillos, is a distinctive and highly effective worm pattern that has become popular among anglers targeting fish in tough conditions. As a Signature Tyer, Grillos developed this fly with a bold, metallic twist that gives it a unique presence in the water. The pattern’s name comes from the addition of metallic elements within the fly’s construction, which not only enhances its visibility but also creates subtle flashes that attract fish.
Pro Tip
Use a Bounce Retrieve: To mimic the natural movement of a worm being swept along by the current, use a "bounce" retrieve. Gently strip the fly in short bursts to allow it to jig and flutter along the bottom, simulating a worm’s struggling movement as it drifts downstream
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Recipe
- Hook: 2x–3x long nymph hook (e.g., Tiemco 200R / 5262) – Size 6–12
- Bead: Large Tungsten Bead (Gold, Silver, or Black Nickel)
- Weight: Lead or Lead-Free Wire (0.020–0.030)
- Thread: 6/0 or 140 Denier – Color to match body
- Body: Micro or Standard Chenille – Worm Colors (Red, Pink, Wine, or Tan)
- Tail: Short Chenille Extension (same as body)
- Ribbing (Optional): Fine Wire for durability
- Coating (Optional): UV Resin on head for durability
Video
From: Andrew Grillos Fly Fishing


