Bow Tuning Troubleshooting Chart: Symptom to Fix
For a right-handed shooter, a tail left paper tear means the arrow is too weak and a tail right tear means it is too stiff. A tail high tear means the nocking point is too high. Fix vertical tears before horizontal ones, move the rest in 1/32 inch steps, and change spine only after rest adjustments fail to close the tear.
Most tuning problems have a small number of causes and a defined order of operations. The trouble is that the same symptom can come from spine, rest position, nock height, clearance or form, and adjusting the wrong one first makes the next diagnosis harder. This chart maps the symptom to the likely cause and the correct fix.
Tuning symptom to cause to fix
| Symptom | Most likely cause | Fix |
|---|---|---|
| Paper tear, tail high | Nocking point too high, or rest too low | Lower the nocking point or raise the rest, 1/32 in at a time |
| Paper tear, tail low | Nocking point too low, or rest too high | Raise the nocking point or lower the rest, 1/32 in at a time |
| Paper tear, tail left | Arrow acting weak, or rest windage off | Move the rest left in 1/32 in steps; if it persists, go one spine group stiffer or reduce point weight |
| Paper tear, tail right | Arrow acting stiff, or rest windage off | Move the rest right in 1/32 in steps; if it persists, go one spine group weaker or add point weight |
| Paper tear, diagonal | Both a vertical and a horizontal error | Correct the vertical component first, re-shoot, then address what is left |
| Tear changes direction shot to shot | Form inconsistency, grip torque, or a clearance problem | Shoot three arrows before judging; check grip and release, then dust the rest and vanes to look for contact |
| Clean tear up close, poor tear further back | Small residual error that grows with distance | Re-tune at 15 to 20 feet, then confirm with bare shafts |
| Bare shaft lands left of fletched | Arrow too stiff | Weaker spine, heavier point, or a small rest adjustment; re-test in 1/32 in steps |
| Bare shaft lands right of fletched | Arrow too weak | Stiffer spine, lighter point, or a small rest adjustment; re-test in 1/32 in steps |
| Bare shaft lands high of fletched | Nocking point too low | Raise the nocking point or lower the rest, 1/32 in at a time |
| Bare shaft lands low of fletched | Nocking point too high | Lower the nocking point or raise the rest, 1/32 in at a time |
| Broadheads group left of field points | Arrow acting weak with the heavier head fitted | Stiffer shaft or lighter head; confirm the spine chart with the actual point weight |
| Broadheads group right of field points | Arrow acting stiff | Weaker shaft or heavier head; check centre shot before changing shafts |
| Broadheads group low of field points | Extra drag and steering from an imperfect launch | Re-tune rather than re-sight; check fletching clearance and head alignment |
| Broadheads fly well individually but do not group | Heads not spinning true on the shafts | Square the shaft ends, spin test each arrow, replace any head that wobbles at the tip |
| Groups drift left or right as distance increases | Centre shot slightly off | Walk-back tune: shoot a plumb line at two distances and adjust rest windage in very small steps |
| Vertical stringing at longer distances | Cam timing or synchronisation, or inconsistent anchor | Have cam timing checked on a draw board at a pro shop; confirm anchor and release consistency |
| Marks on the rest, cables or vanes | Fletching contact | Rotate the nock, change vane size or offset, or adjust rest timing on a drop-away |
| Arrow falls off the rest or nocks feel inconsistent | Nock fit too tight or too loose on the serving | A nocked arrow should hold on the string but release with a light tap; adjust serving diameter or change nock size |
| Peep rotates away from your eye at full draw | String twist not settled or peep installed at the wrong point | Have the string twisted and the peep re-served by a pro shop; do not force it with an elastic tube long-term |
| Loud shot, noticeable hand shock | Loose accessories, arrow too light, or timing off | Tighten every screw, verify the arrow clears 5 grains per pound, then have timing checked |
| Groups tight at 20 yards, open at 40 | A small tuning error magnified by distance | Bare shaft and walk-back tune; do not chase it with sight adjustments |
| Sight marks moved after changing arrows | Different arrow weight and spine | Expected, not a fault: re-tune and re-establish sight marks at every distance |
| Cannot hold the pin steady, creeping forward at full draw | Draw length too long or draw weight too high | Reduce draw weight, then verify draw length; a long draw is the more common of the two |
The order of operations
Tuning out of order is the main reason people go in circles. Each step below assumes the ones above it are already correct, and revisiting an earlier step invalidates the later ones.
| Step | What to set | Typical starting point |
|---|---|---|
| 1 | Correct arrow spine for draw weight, arrow length and point weight | From a spine chart, before anything else |
| 2 | Nock fit on the serving | Holds under light weight, releases with a light tap |
| 3 | Centre shot, the rest windage position | Arrow in line with the string and the cams, or per the maker's spec |
| 4 | Nocking point height | Level to about 1/8 in above square, or as the rest maker specifies |
| 5 | Cam timing and synchronisation | Draw board work, done at a pro shop |
| 6 | Paper tune, vertical first, then horizontal | 5 to 8 feet from the paper, three arrows per reading |
| 7 | Bare shaft group against fletched group | 15 to 20 yards once paper is clean |
| 8 | Walk-back or French tune for centre shot confirmation | A plumb line at two distances |
| 9 | Broadhead confirmation and sight marks | The exact heads you intend to hunt with |
How to read a paper tear correctly
The tear is named for where the tail of the arrow went relative to the hole made by the point. A tail high tear shows a round point hole with a vertical rip extending upward. A tail left tear rips to the left. Read the direction of the rip, not the direction of the hole.
Two rules make paper tuning far more reliable. First, shoot at least three arrows and treat the consistent tear as the real one, because a single tear frequently reflects grip torque or a plucked release rather than the bow. Second, fix vertical before horizontal: a nock height error can push a vane into the rest, and that contact produces a sideways tear that has nothing to do with spine. Chasing it with rest windage moves you further from a tune.
Move the rest in 1/32 inch increments and re-shoot after every change. Larger moves overshoot, and because rest windage and spine produce similar tears, an overshoot in one direction is easy to misread as a spine problem in the other.
When it is the arrow and not the bow
Rest adjustment can compensate for a small spine mismatch, but not a real one. If you have moved the rest a sixteenth of an inch or more and the tear has not closed, the shaft is wrong for the setup. That is a shaft problem, not a tuning problem, and no amount of rest movement will fix it without pushing centre shot somewhere it should not be.
Check the shaft against the arrow spine chart using your actual point weight, not the weight the shaft was originally chosen for. Point weight is the variable most often overlooked here: switching from a 100 to a 150 grain broadhead acts roughly like adding 8 lb of draw weight, which is frequently enough to move you a full spine group. The spine calculator takes point weight as an input for exactly this reason.
Arrow length is the other common culprit. A shaft cut long for clearance can act a group weaker than the chart suggests. Confirm your draw length with the draw length calculator before assuming the shaft is at fault.
Broadhead tuning without the frustration
Fixed broadheads are the most demanding test of a tune, which makes them a useful diagnostic. If your broadheads land with your field points at 20 yards but separate at 40, the tune is close but not finished. If they separate at 20, something structural is wrong: spine, clearance or head alignment.
Work through it in this order. Spin test every finished arrow with the head fitted and reject any that wobble at the tip, because a head sitting on an unsquare shaft end will never group. Confirm vane clearance by dusting the rest and vanes with foot powder and looking for contact marks. Then re-check the paper tear with a broadhead-tipped arrow rather than a field point, which will expose errors a field point hides.
Only after all of that should you move sights. Sight adjustment makes broadheads and field points agree by moving both, which conceals the underlying problem rather than solving it, and the concealment fails at longer distance.
Related tools and charts
- Arrow spine calculator: when the tear says the shaft is wrong
- Draw length calculator: arrow length starts here
- Total arrow weight calculator: verify the safety floor before tuning
- Arrow spine chart: spine by draw weight, length and point weight
- Broadhead weight chart: how head weight shifts dynamic spine
Frequently asked questions
What does a nock high tear mean in paper tuning?
The tail of the arrow passed through the paper above the point, which means the nock end is riding high at launch. The two standard corrections are lowering the nocking point or raising the rest, both in 1/32 inch steps. Fix vertical tears before horizontal ones, because a vertical problem can create fletching contact that produces a false sideways reading.
Does a left tear mean my arrow is too weak or too stiff?
For a right-handed shooter, a tail left tear indicates a weak arrow and a tail right tear indicates a stiff one. Left-handed shooters mirror both. If the tear persists after small rest adjustments, the spine itself is wrong: go to a stiffer shaft or reduce point weight for a weak reading, and the reverse for a stiff one.
Why do my broadheads hit somewhere different from my field points?
Almost always because the arrow is not leaving the bow straight. A broadhead has cutting surfaces at the front that act like small wings, so any yaw at launch gets steered and amplified, while a field point simply drags. The fix is tuning rather than sight adjustment: confirm the paper tear, check fletching clearance, and verify that the spine tolerates the head weight you are shooting.
What does bare shaft tuning tell me that paper does not?
Paper shows you the arrow at one point a few feet from the bow. A bare shaft shows you the accumulated effect over a full flight, which reveals smaller errors that the paper tear hides. For a right-handed shooter, a bare shaft landing left of the fletched group indicates a stiff arrow and landing right indicates a weak one. A bare shaft landing high means the nocking point is too low.
How far from the paper should I stand when paper tuning?
Around 5 to 8 feet is the standard starting distance, close enough that the fletching has not yet corrected the flight. Once you have a clean tear there, repeat at a longer distance, often 15 to 20 feet, because some setups tear clean up close and poorly further out. Shoot at least three arrows before changing anything, since one tear can be a form error rather than a tuning error.
Should I tune my bow myself or take it to a pro shop?
Rest position, nocking point height and paper tuning are all reasonable to do yourself with basic tools. Anything requiring a bow press, including cam timing, cable twisting, string replacement and draw length modules on some bows, is work to have done by a qualified pro shop unless you are trained and properly equipped. A press failure is dangerous and an untimed cam is worse than an untuned one.
How we choose: we compare published manufacturer specifications, verified owner reviews, and pro shop guidance. We do not test gear in person. Draw weight and arrow spine affect safety, so follow your bow manufacturer's specifications and have setup work checked by a qualified pro shop.