Marshall Street Disc Golf Flight Guide

Understanding the Marshall Street Disc Golf Flight Guide

Marshall Street puts out one of those flat-chart style disc flight guides that just lists discs with their numbers and tries to group similar flyers together. You've probably seen them on Reddit or in the disc golf forums. They're simple, usually free to download as a PDF, and they do one thing decently: let you find a replacement for a disc you lost without digging through a bunch of individual reviews. The chart takes every disc from a handful of major manufacturers—Innova, Dynamic Discs, Streamline, MVP, Latitude 60—and lays them out by their four-number flight plate. Speed 1 through 14 on the X-axis, glide 1 through 7 on the Y-axis, and then turn and fade get shaded or color-coded so you can see which discs cluster together. The idea is that if your favorite driver goes [4, -2, 1, 3], you can find every other disc with those same or nearly the same numbers and pick from there. Here's what they don't tell you on the front page: identical flight numbers don't mean identical flights. I learned that the hard way about two years ago when I was trying to find a backup for my old Terra Nova. The guide said the Discmania Foul should be basically the same flight at [5, 2, -2, 1]. It wasn't. The Foul turns way more and fades later than the Terra Nova, even though the numbers are nearly identical. I burned through three Fouls before I figured out the disc was actually too understable for my release angle, and went back to using the Innova Judge as a closer match even though its flight numbers read [5, 2, -1, 2]. Same speed, same glide, different turn and fade, but it flew more like the Terra Nova in practice. That's the whole problem with these charts. They're useful as a starting point, not a destination.

How to Actually Use the Chart Without Getting Misled

Start by pulling up your bag and writing down the actual flight numbers of every disc you throw regularly. Not the numbers you think you throw them with—the manufacturer numbers. Once you have that list, cross-reference with the Marshall Street Disc Golf Flight Guide to see which discs cluster around your main movers. The real trick is looking at the cluster, not any single disc in it. Pay attention to the plastic type and weight range listed alongside each disc. The guide usually includes that, and it matters more than most people realize. A [4, 3, -1, 2] disc in stable Aviar plastic will fly completely differently than a [4, 3, -1, 2] disc in premium Star. The Aviar holds its line. The Star version wants to keep turning. This is where the chart starts to feel misleading if you only look at the numbers. Another thing nobody talks about: the grouping logic. Marshall Street groups discs by proximity, not by exact match. A disc one number away on turn or fade might still be in your cluster if the glide and speed align. That's intentional, because it gives you options. But it also means you're going to get results that feel wrong at first glance. Don't second-guess yourself immediately. Look at the whole group, not just the nearest neighbor.

Where the Guide Falls Apart

The biggest issue is that the chart doesn't account for arm speed or release style. A turnover-prone midrange like the Latitude 60 Sickle reads [-3] on turn, which sounds wild. But for a right-hand backhand thrower with moderate arm speed, it sits around [-1] to [-2] in actual play. The chart treats all numbers as universal, and they're not. Your personal wind-up, your release angle, your follow-through—all of that changes how a disc actually flies compared to what the box says. The second issue is that the guide gets stale. New releases come out every few months, and the PDF doesn't auto-update. I checked mine last month and realized the Dynamic Discs sector was missing about a dozen recent releases. For the newer catalogs, you end up cross-referencing with Discraft or Innova's own charts anyway. At that point, the Marshall Street version is just a convenience, not a authority. There's also the matter of understable versus stable ratings being too broad. The [-4] turn category is supposed to mean "extremely understable," but in reality, a [-4] putter and a [-4] driver behave differently in your hand. The chart groups them together. Again, useful as a first pass, not as final judgment.

Getting the File and Setting It Up

You can find the latest Marshall Street Disc Golf Flight Guide on their website, usually under the Resources or Guides section. It's a single PDF, probably between 2 and 5 megabytes depending on how many manufacturers they've added recently. I keep mine bookmarked and also save a local copy because their site goes down for maintenance every couple months and you can't access it when you're actually at the store trying to pick a disc. I print a copy on letter-size paper and keep it in my bag. It takes up almost no space and you can circle replacements with a pen while you're browsing the bin. Digital works fine too, but screen glare makes reading the smaller print on a course pretty frustrating. If you're going digital, I'd suggest zooming in on the PDF to at least 150% before you head to the pro shop. The default view is tiny.

A Better Approach When the Chart Isn't Enough

When I need something more precise than what the Marshall Street chart gives me, I pull up the Disc Golf Engine database and filter by the same flight numbers plus my personal release conditions. It's slower but more accurate. Or I ask in the r/discgolf Discord and describe my arm speed and typical release. Most people will tell you honestly whether a suggested disc will work for your game. The chart is faster, but the community knowledge is better when you hit edge cases. Keep the Marshall Street Disc Golf Flight Guide as your first step, not your last. It's a good map of the territory. Just don't mistake the map for the land itself.