Scientific Anglers Amplitude Smooth Grand Slam Fly Line
Built for the ultimate flats challenge, the Amplitude Smooth Grand Slam is designed to help anglers pursue the most coveted trio in saltwater fly fishing — tarpon, bonefish, and permit — with one versatile, high-performance line.
Featuring a short, powerful head and a three-quarter heavy taper, this line loads quickly and delivers tight, controlled casts even in wind. It turns over long leaders and bulky patterns like crabs, shrimp, and baitfish with authority, making it equally effective for snook, redfish, and sea trout across a wide range of shallow-water environments.
Amplitude Smooth technology reduces friction for improved shooting distance while maintaining the durability needed for harsh conditions.
| Specification | Detail |
|---|---|
| Taper | Three-quarter heavy |
| Head Type | Short, powerful head |
| Target Species | Tarpon, bonefish, permit, snook, redfish, sea trout |
| Best Use | Shallow water flats, wind conditions, bulky patterns |
FAQ
What makes the Amplitude Smooth Grand Slam different from other fly lines?
The Amplitude Smooth technology reduces friction during casting, allowing for longer and more accurate shots. Combined with a short, powerful head and three-quarter heavy taper, it delivers tight control and strong performance in windy, shallow-water conditions.
Is this line suitable for use with bulky patterns like crabs or shrimp?
Yes, the line is specifically designed to handle long leaders and bulky patterns such as crabs, shrimp, and baitfish with authority and consistent performance.
Can this fly line be used for both tarpon and bonefish fishing?
Yes, it is engineered to effectively target tarpon, bonefish, and permit, making it a versatile choice for the most sought-after species in saltwater flats.


Michelle Payne –
This line performs exceptionally well in windy conditions on the flats. The cast control is excellent, especially with bulky patterns. I’ve used it for bonefish and permit and it holds up well in saltwater.
Abigail Nash –
Great for shallow water fishing. The smooth casting and tight turns make it easy to manage long leaders. Works well with shrimp patterns and has good durability.
John Taylor –
I’ve fished tarpon and redfish with this line and found it reliable and consistent. The Amplitude Smooth tech really helps with casting distance and accuracy in gusty winds.
Emily Anderson –
It’s a solid choice for flats fishing. The three-quarter taper gives good balance between power and control. A bit heavier than some lines, but worth it for the performance.