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Let’s Get into the Weeds: Fly Lines Part 3

Let’s Get into the Weeds: Fly Lines Part 3

Our fly line series so far...

If you’ve kept up with the previous two posts on fly lines, then you’ve slogged through a lot of information on fly line weight, taper, and general physics. Congratulations! You’ve graduated. I hope we’ve managed to beat back some of the mystery surrounding modern fly line specifications. At the very least, you’ve got a few facts in your back pocket to school your buddies with on the river.

If you haven’t kept up, no worries. Regardless of your familiarity with the Common Cents System (see Part 1) or the parts of a taper (see Part 2), Part 3 is meant to be a quick, user-friendly guide to Montana Casting Co. fly lines. Which line is best for you? Read on and find out.

The lowdown on Montana Casting Co. fly lines:

Montana Casting Company is rooted in the traditions of custom rod building. When we decided to expand from those roots, we decided to design our rods, reels, and fly lines in tandem so that each component could maximize the performance of the other. With a selection of three different fly lines in our store, you’re free to customize your line to fit your rod and the environment you plan to fish in.

Just to be clear, our fly rods can be used with any brand of fly line. If you have a tried-and-true brand that you fall back on, use it. Our rods will cast it with ease and accuracy. That said, we’ve put a considerable amount of thought into designing three fly lines that we believe will maximize the performance of your fly rod and we encourage you to give them a try. Here’s a simple rundown of what to look for when choosing a Montana Casting Co. fly line.

What do the names of MCCo. fly lines tell you?

You can choose between the MC-30, MC-38, and MC-40 fly line. Your first hint at the difference between these lines is in the name. MC-30, for instance, indicates that the tapered head of the fly line is in the first 30 feet. Additionally, there will be a number following the name of the general model to specify line weight; MC-306 refers to a 6 wt MC-30 line. As stated earlier, you’ll generally want to match the line weight to the weight of your fly rod.

When should I use the MC-30 fly line?

The tapered head of this fly line is in the first 30 feet, making this an aggressive weight-forward line. If your current fly rod is fast action and you're having trouble loading the rod, try this line; you’ll really feel the difference. This is also a great line for times when you’ll be consistently making short casts of 30 feet or less. It’s a blast to cast!

MC-30 Fly Line Packaging with Specifications
MC-30 Fly Line Specifications

When should I use the MC-38 fly line?

The tapered head of this fly line is in the first 38 feet. That extra 8 ft adds 30 grain to your standard fly line and serves as a happy medium between more aggressive weight forward lines and lengthier tapers meant for long casts. This is a great line for your day-in and day-out fishing trips, and it will work in any condition. (It pairs especially well with the smooth, medium action of the Craig Fly Rod!)

MC-38 Fly Line Packaging Showing Specifications
MC-38 Fly Line Specifications

When should I use the MC-40 fly line?

The tapered head of this fly line is in the first 40 feet. This line fits the AFFTA standards, meaning that it is a standard taper line. Though it works well in all conditions, this line is perfect for long casts with dries to a skittish hog brown or the like. Gentle presentations are key, and the MC-40 is the right fly line for the job.

MC-40 Fly Line Packaging with Specifications
MC-40 Fly Line Specifications

Get out of the weeds and get fishing!

The question of which fly line is right for you can be a complicated one to answer. We’ve mercilessly dissected many fly lines over the years in the name of science… As a result, we’ve gotten our fly rods and fly lines to be exactly what we want them to be. That said, fly fishing is a sport of continuous learning and growth. So get out there, have fun, and experiment!

Have questions? Want to talk shop? We’re always happy to chat. Leave a comment below, send us an email at, or give us a call at 406-285-1452. Happy fishing!


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