How to build a disc golf bag

Start with the shots, not the discs

List the shots you actually play on your home course: the straight putt, the approach that has to stop, the fairway driver that has to turn, the forehand that has to finish left. Then choose discs that produce those shots. A bag built this way is shorter and easier to trust than one built from a list of popular moulds.

If you are new, the list is short: a putter you can throw straight, a midrange that holds a line, something understable for turnovers, and one fairway driver. Four discs cover a surprising amount of a normal course, and each one has a job you can describe.

Coverage, not count

Coverage is the range of flights a bag can produce. The grid has twelve cells: putter, midrange, fairway and distance, each split into understable, stable and overstable. A bag with one disc in each of the cells you use has coverage. A bag with five overstable distance drivers has five discs and one flight.

Count the cells, not the discs. A disc you never throw is not coverage. A disc you throw for one specific shot is.

What the sample bag shows

The 13-disc sample above is a realistic intermediate bag. It has four gaps, all understable: no understable putter, midrange, fairway or distance driver at intermediate arm speed. That is common in a first bag: stable and overstable discs are easier to trust, so angle does the work of an understable disc.

It also has no similar pairs: no two discs in the same cell land close enough to be called near-identical. That is the other half of a good bag. A pair of discs that do the same thing is two slots spent on one shot.

Filling a gap

A gap does not always need a new disc. Sometimes the shot is covered by a disc in another cell thrown on a different angle, and sometimes you genuinely do not need the shot. The useful test is whether you have lost strokes to it. If you have, fill it; if not, leave it empty and carry something you use.

The bag builder lists candidates for a gap from the catalogue, using the manufacturers' numbers. Treat the list as a shortlist: a disc that lands in the cell at your arm speed is a candidate, not a guarantee that it will feel right in your hand.

Near-identical flights

Two discs in the same cell whose landings are within a few metres of each other are a similar pair. The tolerance is generous: within max(6 m, 5% of the longer distance) in distance and max(3 m, 3%) sideways. If they are that close, one of them is a spare.

Keep the one you trust and retire the other, or keep it as a practice copy. The app has a retired state for exactly this: out of the chart, still in the list.

How many discs is enough

Enough to cover the shots you use, plus one spare of the disc you throw most. A useful target is 8 to 12. A larger bag is not better; it is heavier and it makes choosing slower. A smaller bag with deliberate coverage plays faster and teaches you the discs you have.

When to change it

Change a bag when a shot costs you strokes, not when a new mould is released. Add a disc to fill a specific gap; retire one when it duplicates another. Recheck the grid after a few rounds: the arm speed you enter is an estimate, and the disc that was stable in March may be understable by August.