Compound bow tuning guide
The correct sequence — from first setup to bare shaft confirmation. Use the paper tear diagnosis tool to identify your problem and get the exact fix in priority order.
Part of the Archery Calculators setup toolkit — use alongside the Arrow Spine Calculator and FOC Calculator.
The correct bow tuning sequence
Every step depends on the one before it. Jumping ahead means compensating for an upstream problem rather than fixing it.
Pre-flight checklist — confirm these before tuning
Tuning through unconfirmed basics produces unreliable results. Tick all five before running the diagnosis tool below.
Inconsistent groups — is it tuning, equipment, or form?
Paper tuning through inconsistent groups produces meaningless results. Before shooting through paper, answer the four questions below to identify the most likely cause of your inconsistency — and whether paper tuning is even the right next step.
Diagnosis updates automatically as you answer.
Paper tear diagnosis tool
Shoot a fletched arrow through paper at 6–8 feet. Describe what you see below and get your prioritised fix list.
Results update automatically as you make selections. Enter draw weight and arrow length for a spine cross-check.
Tuning session log
Record each adjustment so you can track what worked — and undo anything that made things worse.
No adjustments logged yet. Add your first entry above.
Setting centershot correctly
Centershot is the horizontal starting position for your arrow rest. Most archers set it once and never revisit it — which means their paper tuning fights a bad foundation.
The string alignment method
Nock an arrow and stand at the rear of the bow looking down the string toward the target. For right-handed shooters, the arrow tip should be even with the string or 1/16"–1/8" to the left. This accounts for the bending direction during the power stroke.
The arrow-to-riser method
Lay an arrow alongside the riser in the sight window. The arrow should run parallel to the bowstring. Adjust the rest until the two are parallel — this is a reliable starting point before paper tuning.
When to reset centershot
If paper tuning gives a persistent horizontal tear that does not respond to rest movement in either direction, the starting centershot may be significantly off. Reset to baseline and re-paper tune from scratch rather than stacking adjustments on a bad foundation.
Drop-away rest note
Drop-away rests have a timing component as well as a position component. If the rest does not reach full upright before arrow departure, it deflects the arrow down — creating a nock-high tear that looks like a nocking point problem. Always check timing before adjusting nock height.
Bare shaft tuning at 20 yards
Paper tuning gets your bow close. Bare shaft tuning at distance reveals what is actually happening to your arrow during flight — information paper at close range cannot show you.
Build or buy 2–3 bare shafts (identical to your hunting arrows in weight and length, without vanes). Shoot them alongside 3 fletched arrows at a single aiming point from exactly 20 yards.
| Bare shaft result | What it means | First fix to try |
|---|---|---|
| Bare shaft groups with fletched | Bow is well tuned for your spine | No action needed — proceed to broadhead confirmation |
| Bare shaft hits LEFT of fletched (RH shooter) | Arrow spine too stiff | Add 25 grains of point weight, or reduce draw weight 2–3 lbs |
| Bare shaft hits RIGHT of fletched (RH shooter) | Arrow spine too weak | Remove point weight, shorten arrow 1/4", or increase draw weight |
| Bare shaft hits HIGH of fletched | Nocking point too high, or cam timing off | Lower nocking point 1/16" at a time; re-check cam timing |
| Bare shaft hits LOW of fletched | Nocking point too low, or drop-away timing late | Raise nocking point 1/16"; check drop-away timing cable |
| Bare shaft is scattered (no pattern) | Form inconsistency masking the tune | Focus on grip and release consistency before tuning further |
For left-handed shooters, reverse all left/right interpretations above.
🛒 Shop bow scales on Amazon — confirm your actual draw weight before tuning. The sticker weight is often off by 2–5 lbs at your specific draw length.
Tuning tips that save time
🔄 Change one thing at a time
Make a single small adjustment, shoot 3 arrows through paper, read the result. Changing rest position and nocking point simultaneously makes it impossible to know which variable helped. Use the session log above to track every move.
📐 Measure, don't guess
Nocking point adjustments in 1/16" increments. Rest adjustments in 1/32" increments. Mark your starting positions with a permanent marker before touching anything — so you can always return to baseline.
🏹 Form consistency first
Tuning through inconsistent form produces meaningless data. Complete the pre-flight checklist and warm up with 20 shots before any tuning session. Scattered groups before paper tuning mean coaching will help more than any equipment adjustment.
⚡ New string = new tune
A new bowstring stretches for the first 100–200 shots and changes all your numbers. Never skip re-tuning after a string replacement. Let the string settle first, then restart the sequence from Step 1.
Tools you need for DIY bow tuning
Most of the tuning sequence requires only a T-square, a permanent marker, and your arrows. The three tools that actually improve your results are a bow scale (to confirm actual draw weight — the sticker weight is often off by 2–5 lbs), a grain scale (for FOC and arrow weight calculations), and a chronograph (for arrow speed, which feeds spine selection and sight tape calculations).
Confirm your draw weight is accurate before tuning — use the Draw Weight Calculator for the correct method.
Bow tuning — frequently asked questions
What is the correct order for tuning a compound bow?
Always work in this sequence: verify draw length and cam timing, set centershot, set nock height, paper tune, bare shaft tune at 20 yards, then confirm broadhead flight. Each step depends on the previous one. Jumping to paper tuning with an unchecked centershot wastes time and produces misleading results.
Why are my arrows not grouping consistently?
Inconsistent groups have three primary causes. The most common is form inconsistency — grip variation, inconsistent anchor point, or release timing differences produce random or session-dependent scatter that no amount of bow tuning will fix. The second is equipment issues: fletching contact with the rest, arrows that are not matched in weight, or a damaged nock or vane producing an occasional flyer. The third is a genuine bow tune problem — typically spine mismatch or a significant centershot error. Use the inconsistent groups diagnosis tool above to identify your category before paper tuning. Tuning through inconsistent form produces meaningless results.
How do I read a paper tear accurately?
Shoot through paper at 6–8 feet with a fletched arrow. The point hole is the reference — the nock tear tells you where the back of the arrow is. Nock-high means the tail flies high. Nock-left means the tail goes left. Use the diagnosis tool above to match your specific tear to the correct fix sequence.
What is centershot and how do I set it?
Centershot is the horizontal starting alignment of your rest relative to the string's travel path. Set it by eye first — the arrow tip should be even with the string or a whisker left for right-handed shooters. Paper tuning then fine-tunes from there. Re-check whenever you change rest type or mounting position.
What is bare shaft tuning and when should I do it?
Bare shaft tuning uses unfletched arrows shot alongside fletched arrows at 20 yards. Because bare shafts have no vanes to steer them, they reveal spine and tune issues that fletched arrows conceal. Bare shafts should land within 1–2 inches of your fletched group. Larger separation indicates a spine or tune problem to fix before season.
Does paper tuning replace bare shaft tuning?
No — they answer different questions. Paper tuning at 6–8 feet shows the arrow's launch angle at departure. Bare shaft tuning at 20 yards shows how the system behaves across real hunting distance. Both are needed. Do paper tuning first, then bare shaft tuning to confirm.
Why won't my bow tune no matter what I adjust?
If you cannot get a clean paper tear despite adjusting the rest in both directions, the most likely causes are: wrong arrow spine (use the Arrow Spine Calculator), cam timing off on a two-cam bow, draw length set incorrectly, or an inconsistent grip creating form-induced tears. Check these before continuing to move the rest.
How often do I need to re-tune my bow?
Re-tune whenever you: replace a string or cables, change rest type or position, change arrow length or point weight significantly, change draw length, or notice groups opening up without explanation. A bow stored through a season should be re-verified — strings creep and settings shift.
Can I tune a bow without a bow press?
Most of the sequence — centershot, nocking point, paper tuning, bare shaft tuning — requires no press. A press is only needed for cam timing adjustments, changing draw modules, installing new strings, or yoke tuning. For basic seasonal tune verification, a press is not required.