Jim,

I am with you on that, those Montana trout can really grow big and fight well. I tend to use more 3X than anything else on Montana rivers, sometimes down to 4X and sometimes up to 2X. If I am nymphing, same weight flourocarbon tippet to the first nymph then I drop one size for the dropper nymph.

On pocket waters in small streams I use 5X and sometimes 6X, but then I am going for smaller trout.

Larry ---sagefisher---