Just something to think about, these are not recommendations just observations. Let's say that Steelhead average 10lb's, let's also say that they are pursued on average with a 7 weight spey rod paired with a 500 grain skagit head.
Also, let's take a trout of 15" and it's weight is on average 1.5lbs. And because Trout Spey is relatively new there is a lot of trial and error going on. So the question is what is a good recommendation for line size.
If we calculate the relationship between a 10 lb Steelhead's weight and a 1.5lb (15") Trout: 10/1.5=6.67. So, the Steelhead weighs 6.67 times more than the trout. If we then take the 500 grain head used to catch the Steelhead and use the same relationship: 500/6.67=75 grains. So if you persue Steelhead with a 500 grain skagit head then the same relationship would be a 75 grain skagit head for trout.
Or to put it another way if you are pursuing 15" trout with a 300 grain skagit head: 300*6.67=2,000 grain skagit head for Steelhead. If you pursue 15" trout with a 300 grain skagit then it would be like pursuing 10lb Steelhead with a 2,000 grain skagit head.
How about a 20" trout? It weighs on average 4lbs. So: 10lb/4lb=2.5. Steelhead weighs 2.5 times more than the trout. So, 500gr/2.5=200gr. So a 200 grain skagit head would be the same relationship.
Again this is just putting things into perspective, it is not meant to judge, offend, etc., etc. It's just something to keep in mind.
Also, let's take a trout of 15" and it's weight is on average 1.5lbs. And because Trout Spey is relatively new there is a lot of trial and error going on. So the question is what is a good recommendation for line size.
If we calculate the relationship between a 10 lb Steelhead's weight and a 1.5lb (15") Trout: 10/1.5=6.67. So, the Steelhead weighs 6.67 times more than the trout. If we then take the 500 grain head used to catch the Steelhead and use the same relationship: 500/6.67=75 grains. So if you persue Steelhead with a 500 grain skagit head then the same relationship would be a 75 grain skagit head for trout.
Or to put it another way if you are pursuing 15" trout with a 300 grain skagit head: 300*6.67=2,000 grain skagit head for Steelhead. If you pursue 15" trout with a 300 grain skagit then it would be like pursuing 10lb Steelhead with a 2,000 grain skagit head.
How about a 20" trout? It weighs on average 4lbs. So: 10lb/4lb=2.5. Steelhead weighs 2.5 times more than the trout. So, 500gr/2.5=200gr. So a 200 grain skagit head would be the same relationship.
Again this is just putting things into perspective, it is not meant to judge, offend, etc., etc. It's just something to keep in mind.