Do These Used Irons Match My Swingweight Targets?
Check used irons against the intended swingweight of each finished club, not one number for the entire set. Enter measured readings and agreed targets to expose individual differences while preserving deliberate progressions. A matching result confirms only that comparison; it cannot establish that the target fits you or that the club is sound.
A seller's “all standard” description is not a swingweight record. Nor does a shaft label tell you the balance of the assembled club. Before paying for a used set or approving a rebuild, ask which readings were actually measured and which were copied from a specification sheet.
The golf club fitting tool supplies starting specifications, not a personal swingweight target. Use the separate used-iron length check if your question is whether the assembled lengths suit you. This worksheet checks a different purchase detail: whether the finished clubs match the balance targets you have established.
Check each club against its own target
Use measured finished-club readings and targets agreed for those builds. This does not choose a swingweight for you.
Within band means only that these entries agree within your chosen band. It does not certify fit, condition or future performance. Unknowns remain unresolved.
These are starting specifications, not a fitting. Confirm them against the club itself before you buy. See Terms.
Establish the target for each club first
A target needs a basis: your fitter's build sheet, a clubmaker's agreed specification, or the manufacturer's published stock configuration when stock conformity is the question. Those are different comparisons. A factory reference tells you about the advertised build, not what you personally should play.
Do not copy the 7-iron's target into every row merely because the heads share a model name. Some sets have a planned progression into the shorter clubs. Keeping a target beside each measurement prevents a deliberate difference from being labeled a defect.
Manufacturer example: PING's G440 Iron specification page lists D0 for the 8-iron, D0.5 for the 9-iron and D2 for the pitching wedge. Its notes say graphite-shafted standard builds are two to three points lighter than shown, depending on flex, and achievable swingweights depend on shaft, length and grip combinations.
That example demonstrates why a flat target is not universal; it is not a recommendation to copy those values into another set. Check the exact model and build notes before using a manufacturer reference. For a customized or previously altered set, obtain the intended finished-build targets rather than treating stock specifications as its repair instructions.
If no target has been established, enter a question mark. The worksheet can retain that club in the record without pretending to assess it. Do not choose D2 simply because it appears frequently in a discussion or because the worksheet needs a number.
Get comparable finished-club measurements
Ask for a reading of every included club with its actual grip installed. Measurements from a partly assembled club and a finished club do not describe the same condition. Record changes such as a different grip, an extension or added weight alongside the reading, even when the seller considers them minor.
GolfWorks' economy-scale instructions describe a fourteen-inch-fulcrum swingweight measurement and stress a level setup with the grip end against the stop. Follow the instructions for the actual instrument being used. A number without a repeatable measurement setup is a weak basis for ordering work.
- Identify each head, shaft and installed grip in the offered set.
- Record the current finished length and any disclosed alterations separately.
- Ask the operator to check the scale setup and measure every finished club.
- Repeat an unexpected reading before accepting it as a build difference.
- Keep the target source and measurement date with the record.
Total weight is a separate measurement, normally recorded in grams. GolfWorks' digital-scale instructions distinguish total-weight mode from swingweight mode and describe different club placement. Do not enter a total club mass or the shaft's advertised gram weight in a field expecting a reading such as D1.
For a remote purchase, a club-by-club sheet from the seller or a shop is more useful than a photograph of one club on a scale. Ask whether the whole set was measured on the same setup. If readings come from different instruments, resolve comparability before interpreting a small difference.
Read points across letter boundaries
The letter and number form one sequence, with ten points per letter. C9 to D0 is one point; C9 to D1 is two, not eight. The worksheet converts that sequence internally and reports measured minus target for each row.
- Positive difference: the measured reading is above the entered target.
- Negative difference: the reading is below the entered target.
- Zero: the entered readings match, at the precision recorded.
- Unknown: a reading or target is missing; no match is inferred.
Decimals are accepted when the measurement record genuinely supplies them. Adding a decimal to a rough reading does not improve the instrument's accuracy. The output is arithmetic on your entries, not a claim that a particular shop can measure or build to a tenth of a point.
Enter a comparison band agreed for this audit. A band of half a point means differences from minus half to plus half are included, but that is your chosen rule, not a universal acceptance tolerance. The worksheet deliberately supplies no default band and does not recommend one from swing speed.
A set with one exception and an intentional progression
Consider this hypothetical three-club record, with an agreed comparison band of half a point. These are invented entries for explaining the arithmetic, not specifications for a named product or results from a SpecMyBag fitting. The pitching wedge deliberately has a different target.
| Club | Target | Measured | Difference | Comparison |
|---|---|---|---|---|
| 6-iron | D1 | D1 | 0.0 | Within band |
| 7-iron | D1 | C9 | −2.0 | Outside band |
| PW | D3 | D3.5 | +0.5 | Within band |
The 7-iron needs a recheck and an explanation. The wedge is within the entered band even though its reading differs substantially from the 6-iron's. Setting every target to D1 would manufacture a second apparent problem that the agreed build sheet does not contain.
Do not average the differences into one set score. A club above target does not cancel another below target, and a missing reading is not a zero. Keep the individual exceptions attached to their club labels so the seller or builder can address the correct pieces.
Keep unknowns unresolved
A blank field can disappear inside a tidy-looking spreadsheet. Here, use a question mark for a missing target or measurement; the club stays in the output as unresolved. The summary reports unresolved rows separately from rows outside your chosen band.
That distinction matters when comparing offers. One seller may provide a complete record with an explained exception, while another provides only a blanket assurance. The second set is not automatically better merely because no numerical discrepancy has been documented.
Ask the seller: “Please list each included club, its measured finished swingweight, the installed shaft and grip, and any length or weight modifications. If a reading is unavailable, mark it unknown rather than copying the manufacturer's target.”
Check that the rows cover everything you intend to buy. Three completed rows do not approve a seven-club set, and a matching record does not check for a missing iron. Keep the included-club list beside the measurements and the seller's return conditions.
Investigate before changing weight
An outside-band reading identifies a difference, not its cause or cure. Compare the actual length, shaft, grip and visible modifications with the intended build. A clubmaker may find that the target was copied incorrectly or that an intentional alteration was omitted from the seller's description.
Do not turn the reported difference directly into grams of head weight. GolfWorks' technical FAQ shows that changing grip mass can change the scale reading without changing the head's mass. Matching the letter-number value by a different component change does not establish an identical build or playing response.
- Verify the measurement before discussing a remedy.
- Confirm that the target applies to this exact configuration.
- Ask which component difference explains the reading, if known.
- Request a finished-build recheck after any agreed work.
The worksheet makes no prediction about shaft stiffness, strike, launch, spin or carry. It also cannot establish whether two clubs with the same reading will feel identical to you. For shaft selection, return to the shaft-weight starting guide; for distances between clubs, use measured set gapping.
Turn the record into a buying decision
Before committing, separate three questions: does the set match its stated build, does that build suit your intended specifications, and is the physical condition acceptable? This audit helps with the first only. A complete within-band record does not answer the other two.
For each unexplained exception, ask whether inspection or work is needed and obtain a specific quote. Include that quote in the purchase comparison instead of assuming every discrepancy has a cheap, reversible fix. If a seller cannot provide measurements before payment, treat the remaining uncertainty explicitly when considering inspection and return arrangements.
A useful handoff: “The 7-iron reads two points below its recorded target; please remeasure it, check the configuration and explain any proposed work. The wedge has its own target, so do not flatten the progression just to make the sheet look uniform.”
If you already play the clubs comfortably, the record alone is not a reason to dismantle them. Discuss any concern with the fitter in the context of the actual clubs and your experience. Neither a stock specification nor a worksheet flag proves that a change will improve your golf.
Sources and limits
Manufacturer specifications and equipment instructions support the cited examples and measurement distinctions. The row-by-row comparison, unknown-data handling and buying checklist are editorial decision support. SpecMyBag has not measured this set, tested these clubs or fitted a golfer to the example targets.
Your entries stay in this browser; they are not sent or saved. The worksheet does not update the site's iron database, infer hidden component specifications or certify seller claims. Keep the original measurement sheet and confirm the final build with the person responsible for it.