Every group tells a story. Most archers don't read it. They see three arrows in a fist-sized cluster and call it good. They see five arrows in a foot-wide spread and blame the bow.
The pattern of the group is the diagnosis. Here's how to read it.
Tight Round Group
Three to five arrows in a baseball-sized cluster at 20-40 yards. Center-mass.
This is what you want. Bow is tuned, form is consistent, arrows are matched. Nothing to fix. Move out to 50 and 60 yards to see if the pattern holds.
Vertical String
Arrows stacked top-to-bottom in a vertical line. Could be 6 inches at 30 yards, could be a foot at 50.
Vertical strings are about nock height, spine, or release timing.
- Check first: Nocking point. If it's not 1/8 to 1/4 high of square, fix it. Re-shoot.
- Then check: Spine. A weak-spined arrow will porpoise more, exaggerating the vertical impact spread.
- Then check: Release. A punch release with inconsistent timing creates vertical scatter. So does collapsing during the shot.
Vertical strings at long range that aren't at short range often mean nock pinch — the loop is pinching the nock and releasing inconsistently. Check d-loop spacing.
Horizontal String
Arrows stacked left-to-right. Three at 30 yards over a 6 inch horizontal spread, all roughly at the same height.
Horizontal is about your hand. Or the rest.
- Check first: Grip torque. Your bow hand is doing different things shot to shot. Same hand position, same pressure point, every shot.
- Then check: Anchor point. Lateral anchor shift moves left-right impact.
- Then check: Rest set wrong. Walk-back tune to confirm. See the walk-back post.
If your horizontal string opens up with longer distance, it's grip torque. If it opens equally at all distances, it's rest position.
Diagonal String (Top-Left to Bottom-Right or Opposite)
Combination problem. Vertical issue + horizontal issue at the same time.
Fix one at a time. Vertical first (nock point, spine), then horizontal (grip, rest). If you chase both, you'll never know which adjustment helped.
Random Scatter
Arrows everywhere. No pattern. 8 inch group at 20 yards.
This is either a bow that needs tuning or a form that needs work. Or both.
The test: have somebody else shoot the bow. If their group is tight, your form is the problem. If their group is also scattered, the bow is the problem.
Bow problems: cam timing out, rest loose, sight pin loose, string twisting in the cams (peep rotation issues).
Form problems: see the target panic post. Also: bad anchor, inconsistent draw, eye drift, collapsing on release.
One Flyer Out of Five
Four arrows in a fist, one arrow six inches out.
That flyer is data. Don't ignore it.
Most common cause: the one arrow that's not matched to the other four. Different weight, different spine, bent shaft, damaged nock, off-center insert. Pull all five arrows. Weigh them. Spine test them. Spin test for wobble.
If the flyer arrow is in spec, then it was you. Probably grip torque or a flinch. The next time you shoot, that flyer becomes your test arrow — focus on grip and release. If it comes back into the group, the flyer was form.
Group Drifts as You Shoot More
First three arrows hit center, second three hit left, last three hit further left.
You're tiring. Form is collapsing as you fatigue. Bow is too heavy or you're shooting too many reps without rest.
Also possible: peep rotation, which happens as the bow shoots and the string twists. Mark your peep with a marker dot. If the dot rotates between shots, peep is unstable. Re-serve.
Group Shifts Between Sessions
Tuesday you hit center at 30. Thursday you hit 3 inches left at 30.
Either your sight moved, your bow tune drifted, or your form is inconsistent session-to-session. Check sight first (most common). Check arrow weight if you swapped arrows. Check cam timing if it's been more than 200 shots since the last tune.
Patterns at Distance vs Patterns Up Close
A bow can group tight at 20 and scatter at 50. This is almost always tune.
Short range hides tune problems. The arrow doesn't have enough distance to express the kick it's leaving the bow with. At 50 and beyond, that kick becomes a foot of spread.
If you group well at 20 but poorly at 50, walk-back tune the bow. See the walk-back post.
The Forge Side
The Forge lets you log groups and patterns by distance. Over time it identifies trends — your average group at 30 yards, your typical fliers, your session-to-session shift. You can spot a tune drift before it costs you a competition or a hunt.
The Bench Wisdom
One bad shot is form. One bad arrow is the arrow. A pattern is the bow.
Read the pattern. Fix the cause, not the symptom.