Sight Pins & The Peep

Lesson 12 of 33 · Module 4, lesson 1

Assumes the Hunting Primer. New here? Start there first.

Your objective

By the end, you'll be able to explain how a multi-pin compound sight and peep sight work together and describe the three-step aiming alignment used on every compound bow shot.

Concept ~7 min

You draw back on a feeding buck at 28 yards. Your eye finds the bright fiber-optic pin and you settle it on the crease behind his shoulder. You release — and the arrow flies six inches high. You did everything right from the waist down. What went wrong? Most likely: you put the pin on the target before you looked through the peep. This lesson fixes that habit before it costs you a deer.

Quick recall

Quick recall from Archery Form — what is the anchor point and why does every shot need the same one?

A fixed, repeatable contact point (corner of mouth, nose to string, thumb to jaw) that places your eye in the same position behind the peep every draw. The spot on the target where you aim the pin. How far back you pull the bowstring before you start aiming.

Show answer

Correct: A fixed, repeatable contact point (corner of mouth, nose to string, thumb to jaw) that places your eye in the same position behind the peep every draw. — Exactly. A consistent anchor is the prerequisite for consistent peep alignment — one enables the other.
Not quite: The spot on the target where you aim the pin. — That's the aiming point, not the anchor. The anchor is where your draw hand contacts your face — it positions your eye behind the peep.
Not quite: How far back you pull the bowstring before you start aiming. — The anchor is not a stopping point in the draw — it's a specific, repeatable contact between your draw hand and your face that locks your eye position.

What each part does

A compound bow sight system has two pieces: a front sight mounted on the bow riser, and a rear sight (the peep) tied into the bowstring.

The front sight is a housing — a circular frame containing one or more fiber-optic pins. Each pin glows bright (green, red, or yellow) so it’s easy to see in low light. A 3-pin or 5-pin sight has a pin set for each distance you commonly shoot: typically 20, 30, and 40 yards for hunting.

The peep sight is a small disc with a hole in the center — the size of a shirt button — that is twisted into the bowstring strands between the two cam wheels. When you draw to your anchor, the peep rotates to face your eye. Looking through the hole is looking through your rear sight.

Schematic diagram illustrating a compound bow aiming system with a peep sight in the string and a multi-pin front sight housing mounted on the riser. — Diagram (not a photo). The aiming chain: peep (rear sight, in the string) → sight housing (front sight frame) → pin (the precise aiming point) → target.

The why Why not just aim with the pin alone — who needs the peep?

Without a peep, there is no control over where your eye sits behind the front sight. Move your head a quarter-inch left or right — which happens shot to shot without a rear sight — and the pin’s position on the target shifts even though the bow points the same direction. The peep is what turns a front-sight pin into a consistent aiming reference. It is the anchor for your eye, just as the anchor point is the anchor for your hand.

Peep size affects the trade-off between light and precision. A small aperture (1/16 in.) is more precise but darker; a larger aperture (1/4 in.) lets in more light for dawn/dusk but is slightly less precise. Most hunting hunters use 3/16 in. as a middle ground.

The three-step aiming alignment

Every compound bow shot uses the same three-step sequence — in this order. Skipping or reordering steps is the source of most missed shots.

Step 1 — Center the housing in the peep. When you hit your anchor, look through the peep hole and find the sight housing. Your brain naturally wants to center concentric circles. Let it: the housing sits inside the peep like a bullseye. This step controls your head position.

Step 2 — Check the bubble level. Most front sights have a small level with a bubble. A canted bow shoots left or right depending on which way it leans — even a small cant causes a horizontal miss at 30 yards. Glance at the bubble; center it before you go to the pin.

Step 3 — Put the correct pin on the target. Now — and only now — settle the glowing pin on your intended point of impact. For a deer at 28 yards, use your 20-yard pin and hold slightly high, or your 30-yard pin and hold a touch low, depending on how your specific pins are set up. Many hunters set a 30-yard pin and a 20-yard pin as their two primary hunting distances, since most bow shots at deer occur within that window.

Edge case Fixed pins vs. a single movable pin sight — which should a beginner choose?

A fixed multi-pin sight (3–5 pins) is the standard hunting choice. You set each pin once (at the range), and in the field you simply pick the right pin for the distance — fast and simple under pressure. The trade-off: in-between distances (27 yards, 33 yards) require you to mentally interpolate.

A single movable-pin sight (a “slider” or “dial”) has one pin you dial to the exact distance. Extremely precise, but it adds a step — you must spin the dial after ranging. Fine on a calm treestand wait; trickier on a roaming deer with seconds to spare. Most bowhunters start with a 3-pin fixed sight and learn the movable pin after building experience.

Explore the sight picture

The three concentric circles you see at full draw — peep, housing, target — are the foundation of a consistent shot. Tap each element below to understand its role.

Explore

Tap each part of the aiming system to understand what it does.

Schematic of the compound bow three-circle sight picture: outer circle is the peep aperture, middle circle is the sight housing ring, and the bright pin sits centered inside the housing aimed at the deer's vital zone.

Make the call

Knowledge check

You draw, hit your anchor, glance through the peep, and the sight housing looks off-center inside the peep hole. What should you do?

Put the pin on the target anyway — close enough. Let down, reset your anchor, and re-draw. Rotate the sight housing left or right until it looks centered.

Show answer

Not quite: Put the pin on the target anyway — close enough. — An off-center housing means your head position is inconsistent. The pin position on the target will be wrong. Let down and re-draw with a focus on hitting your anchor.
Correct: Let down, reset your anchor, and re-draw. — Right. The peep alignment happens at anchor. If the housing is off-center, the anchor was inconsistent. The fix is to let down and re-draw, not to override the sight picture.
Not quite: Rotate the sight housing left or right until it looks centered. — The housing is bolted to the riser — it does not rotate. What moves is your head position via your anchor. A bad anchor = a bad sight picture. Let down and re-draw.

Knowledge check

You are set up at a treestand. A deer steps out and stops. You range him at 27 yards. You have a 20-yard pin and a 30-yard pin on your sight. What is the correct approach?

Use your 30-yard pin and aim slightly high to split the difference. Use your 20-yard pin and hold a touch high on the body. Use your 30-yard pin and aim slightly low (just inside the crease) — or use the 20-yard pin and hold a touch high — depending on how your pins are actually set up at the range.

Show answer

Not quite: Use your 30-yard pin and aim slightly high to split the difference. — You would aim slightly LOW, not high, with the 30-yard pin at 27 yards (the arrow would hit high at 27 if you aimed at the same hold you use at 30). In practice, many hunters use the 30-yard pin and aim just at the crease — but knowing which direction matters.
Not quite: Use your 20-yard pin and hold a touch high on the body. — The 20-yard pin at 27 yards will impact low — the arrow has had more time to drop. You'd aim slightly HIGH with the 20 pin, not high on the body.
Correct: Use your 30-yard pin and aim slightly low (just inside the crease) — or use the 20-yard pin and hold a touch high — depending on how your pins are actually set up at the range. — Correct. In-between yardages require you to interpolate between your set pins. Knowing YOUR bow's actual hold at 27 yards comes from range practice at those specific distances, not guessing in the moment.

Take it to the woods

The only way to ingrain the three-step sequence is range repetition. The checklist below is your next practice session plan.

Range session: ingrain the three-step alignment

0/6

Set up at 20 yards. Draw to your anchor with your eyes closed.
Open your eyes. Check: is the housing centered in the peep WITHOUT moving your head?
Find the bubble level BEFORE you look at the pin. Correct any cant.
NOW settle the correct pin on the target. Shoot.
Repeat the three steps at 30 yards with your 30-yard pin.
If safe, do 2 shots in fading afternoon light — the fiber optics should still glow clearly. Hunting shots often happen in low light. Know your sight in those conditions.

Sources

Archery 360, “Focus on the Peep — Form Tips for Beginners, Part 2” (2023): https://archery360.com/2023/09/21/focus-on-the-peep-form-tips-for-beginners-part-2/
October Mountain Products, “Peep Sight Sizes: A Comprehensive Guide”: https://www.octobermountainproducts.com/2023/08/peep-sight-sizes-a-comprehensive-guide-to-choosing-the-right-size-for-you
SCDNR Hunting Information and Regulations: https://www.dnr.sc.gov/hunting.html (verify current SCDNR regulations before you hunt — these change yearly)

If you remember nothing else

The peep sight is your rear sight — it lives in the string and aligns your eye to the front sight housing on every draw.
Aiming has three steps in order: center the sight housing in the peep, bubble level, then put the pin on the target.
Each sight pin is set to a specific distance — the 20-yard pin is for 20-yard shots, the 30-yard pin for 30-yard shots.
Rushing straight to the pin and skipping the peep alignment is the most common beginner accuracy error.
Consistent anchor point and peep alignment must happen before you think about where the pin sits.

How ready do you feel?

How ready are you to walk through the three-step aiming alignment on a compound bow shot — peep, level, pin — without prompting?

Before you go — a quick look back

Distributed practice: one fast recall from an earlier lesson keeps it from fading.

Quick recall

From Draw & Anchor — what makes an anchor point useful, and why does every shot need the same one?

Show me the answer

Show answer

Correct: Show me the answer — A repeatable anchor point puts your eye in the same position behind the peep on every draw. Without it the peep rotates and the sight picture changes shot to shot — the anchor is what makes the peep alignment possible.

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