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CartRechecking Zero: The #1 Accuracy Fix PRS Shooters Overlook
If you’re missing by a tenth in a PRS stage, the problem is almost never your dope, your app, or your rifle. It’s your zero. And James Eagleman has seen it hundreds of times.
Why This Matters – Rechecking Zero
PRS shooters obsess over data—BCs, atmospherics, wind brackets, stage prep, and ballistic apps. But the most common accuracy failure in a match isn’t complex at all. It’s a simple oversight that costs shooters points every single weekend:
They don’t recheck their zero when they arrive at a new location.
James Eagleman, creator of Eagle Ballistics, gets messages constantly from shooters who trust the app, love the accuracy, and rely on its six‑target stage capability. But every once in a while, someone texts him:
“Hey, I just shot a stage and I was a tenth mil off on X.”
And James’ answer is always the same—because the cause is always the same.
1. Your Zero Is Off—Even If You Checked It Two Days Ago
This is the part PRS shooters hate to hear, but it’s the truth:
If you travel to a new range, your zero can shift.
Different elevation.
Different temperature.
Different humidity.
Different light conditions.
Different shooting position.
All of these can move your point of impact just enough to cost you hits.
James puts it bluntly:
“Recheck your zero. Your zero’s off.”
Even if you zeroed 48 hours ago.
Even if your rifle “never moves.”
Even if you swear nothing changed.
PRS is a game of tenths. A tenth off at 100 becomes a miss at 800. And in a match where every point matters, that’s the difference between top‑10 and middle of the pack.
2. Velocity Changes? You MUST Unlock and Relock Zero Scope Angle – Rechecking Zero
The second most common mistake James sees is shooters adjusting velocity in Eagle Ballistics—but forgetting one critical step:
You must unlock and relock Zero Scope Angle Lock.
Here’s why:
Zero Scope Angle represents the exact relationship between your barrel and your reticle at the moment you zeroed.
When your muzzle velocity changes—even slightly—that relationship changes too.
James demonstrates it clearly:
- Original velocity: 2896 fps
- At 1,000 yards: 8.52 mils
- New velocity: 2880 fps
- After unlocking/locking Zero Scope Angle: 8.64 mils
That’s a 0.12 mil difference—more than enough to miss a plate.
Shooters often think their BC is wrong or their atmospherics are off.
But the real issue is simple:
You changed velocity but didn’t relock Zero Scope Angle.
3. The Two-Step Fix That Solves 100% of “My Dope Was Off” Complaints – Rechecking Zero
James says it clearly and confidently:
This fixes the problem 100% of the time.
Here’s the checklist every PRS shooter should run before a match:
✔ Step 1: Recheck Your Zero
Do it at the match location.
Do it even if you zeroed recently.
Do it even if your rifle “never shifts.”
✔ Step 2: If Velocity Changes, Update It AND Relock Zero Scope Angle
- Enter the new velocity
- Unlock Zero Scope Angle Lock
- Relock it
If you skip this step, your data will be wrong—guaranteed.
Why This Matters in PRS
PRS stages are fast. Targets are small. Wind is unpredictable. You don’t have room for preventable errors.
A tenth mil off at 600 yards?
That’s a miss.
A tenth mil off at 1,000?
That’s a big miss.
And when you’re running six targets per stage—something Eagle Ballistics excels at—your ballistic foundation must be rock solid.
Your zero and your velocity are the foundation.
Final Word from James Eagleman
There’s a reason Eagle Ballistics includes Zero Scope Angle Lock.
There’s a reason it forces you to confirm it when velocity changes.
There’s a reason James repeats this advice constantly.
Because it works.
Recheck your zero.
Update your velocity.
Unlock and relock Zero Scope Angle.
Do those three things, and your dope will be dead‑on every time.
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PRS Match‑Day Checklist: The “Don’t Lose Points to Dumb Stuff”
A practical, field-tested workflow for competitive shooters running Eagle Ballistics
1. Arrival at the Range (Before You Even Unload the Truck) – Rechecking Zero
These steps prevent 90% of the “my dope was off” texts James gets.
- Check your torque
- Action screws
- Scope rings
- Arca rail
- Bipod
- Anything that can loosen during travel
- Confirm your rifle is at ambient temperature
Cold truck → warm range = shifting zero. - Update atmospherics in Eagle Ballistics
- Temp
- Pressure
- Humidity
- Density altitude
Let the app know where you actually are.
2. Zero Check (Non‑Negotiable) – Rechecking Zero
This is the #1 cause of misses. Do it even if you zeroed yesterday.
- Fire a clean 3–5 round group at 100
- Confirm point of impact
- If it moved, adjust
- If it didn’t move, good — but don’t skip the check
- Reconfirm parallax
Parallax error = misses on small plates. - Verify your scope is level
A canted rifle introduces elevation and wind error.
3. Velocity Confirmation (If Needed)
If your rifle has been sitting, traveling, or shooting in different temps, velocity can drift.
- Shoot a quick 5‑shot string over a chrono
- If velocity changed:
- Enter new velocity in Eagle Ballistics
- Unlock Zero Scope Angle Lock
- Relock Zero Scope Angle Lock
This step alone fixes nearly every “I was a tenth off” complaint.
4. Build Your Match Profile in Eagle Ballistics
Do this before the first stage so you’re not scrambling.
- Create all stages in PRS Mode
- Up to six targets per stage
- Name targets clearly (T1, T2, KYL, Mover, etc.)
- Range every target
- Use your LRF
- Confirm with a buddy if needed
- Capture inclination and azimuth
- This matters more than people think
- Set wind direction and bracket
- Lock relative wind if the wind is consistent
- Add wind variance if it’s gusty
- Add movers (if applicable)
- Speed
- Direction
- Angle
5. Pre‑Stage Prep (The 60‑Second Routine) – Rechecking Zero
This is where top shooters separate themselves.
- Confirm your dope for each target
- Quickly glance at elevation and wind
- Check your mag
- Round count
- Orientation
- No damaged rounds
- Check your rifle
- Bolt cycles smoothly
- Turrets are on zero
- Parallax set for first target
- Check your bag + gear
- Bag height matches the prop
- Tripod ready (if allowed)
- Timer reset
- Visualize the stage flow
- Positions
- Target order
- Transitions
- Where you’ll breathe
- Where you’ll break shots
6. On the Line (Right Before the Beep) – Rechecking Zero
This is where nerves ruin good shooters.
- Dial elevation for T1
- Hold wind — don’t dial it
- Confirm parallax one more time
- Check your bubble level
- Get stable before the timer starts
- Exhale and relax your shoulders
7. After Each Stage (The Reset) – Rechecking Zero
This keeps your match from spiraling.
- Return turrets to zero
- Check your rifle for impacts or bumps
- Update wind if conditions changed
- Review your hits/misses
- Was it wind?
- Was it position?
- Was it a tenth off?
If it was a tenth off, revisit zero or velocity.
8. Mid‑Match Zero Check (Optional but Smart) – Rechecking Zero
If you’re shooting a two‑day match or conditions shift dramatically:
- Shoot a quick 1–2 round confirmation
- If POI moved:
- Adjust
- Update Eagle Ballistics
- Relock Zero Scope Angle
This is how you avoid the “my rifle fell off a prop and I didn’t realize it” disaster.
The PRS Shooter’s Golden Rule – Rechecking Zero
If your data is off by a tenth, it’s almost always your zero or your velocity — not the app.
Recheck zero.
Update velocity.
Unlock and relock Zero Scope Angle.
Do those three things and your dope will be rock solid all day.