# ScopeDOPE™ — Engine Accuracy Marketing Guide

**Audience:** Marketing copy, app store listings, social media, press, comparison discussions
**Source of claims:** `BALLISTICS_ENGINE_ACCURACY_ANALYSIS.md`, validation test suite
**Version and date:** see Revision Control Block at the end of this document

All claims in this document are backed by documented validation data. Do not modify accuracy figures without re-running the `:shared:ballistics:jvmTest` validation suite (`./gradlew :shared:ballistics:jvmTest`) and updating the source document.

**Positioning note — read first.** The physics engine is the **floor, not the product.** Every serious ballistics tool uses the same G7/G1 drag model; matching it is the price of admission, not the differentiator. The product is what ScopeDOPE does next: correct that physics with the shooter's own confirmed impacts — DOPE-Blend™ field-correction. This guide supplies the validated accuracy numbers that *prove the floor is solid*, so the correction story can be told with credibility. Lead with the correction. Use the physics numbers as proof, not as the headline. Per the Brand and Legal Language Guide, never call DOPE-Blend "the engine," and never name the engine itself — it has no public name.

---

## 1. The Core Story

Most ballistic calculators give you a number. A Ballistic Computer™ gives you a number **you can trust** — because it starts from what your rifle actually did and corrects itself.

**Correct physics is the floor. Your DOPE is the product.**

Underneath, ScopeDOPE solves the same G7/G1 trajectory every serious tool solves — implemented against the same McCoy drag tables as JBM Ballistics, verified to agree within instrument precision. That shared physics is the baseline, not the story. The story is DOPE-Blend field-correction: every confirmed impact you record pulls the solution toward your actual rifle, your actual ammo lot, your actual barrel. Correct at the distances you've shot; smoothly interpolated across the gaps.

This is the difference between a calculator and a **Ballistic Computer.**

---

## 2. Validated Accuracy Claims

These figures are derived from the validation test suite against confirmed real-world fired data. Use exactly as stated — do not round up or generalize.

### The headline number

> **With DOPE-Blend correction applied, ScopeDOPE's predictions match confirmed field-fired impacts to within 0.063 mils mean error.**

Source: .17 HMR Tier 3 validation — 3 confirmed fired impacts (Varmint Al field test, T/C Contender 22" barrel, 0.125 MOA/click scope), 150–300 yards including the transonic zone.

**Integrity caveat — read before using the headline.** This figure rests on a single rifle and three confirmed impacts. It is real, documented, and defensible *as stated* — but it is a narrow evidence base, not a population result. State it precisely ("on a documented .17 HMR field test, mean error was 0.063 mil"), never as a general guarantee ("accurate to 0.063 mil"). The honest framing is a strength with this audience: a specific, sourced, modest claim reads as credible; a sweeping one invites the skepticism §5 exists to avoid. As more field-fired data is collected across rifles and calibers, broaden the claim — not before.

### Supporting numbers

| Claim | Value | Context |
|---|---|---|
| Mean error vs real fired impacts (DOPE-corrected) | **0.063 mil** | 3 confirmed impacts, 150–300 yd |
| Max error vs real fired impacts (DOPE-corrected) | 0.130 mil | 300 yd, transonic zone — **do not use in marketing; too large for a credible claim** |
| Physics engine agreement with G7 standard table | **< 0.01 mil** | Same McCoy G7 table as JBM Ballistics |
| Interior interpolation accuracy (k=1 LOO) | **< 0.025 mil** | All G7 centerfire loads, 200–1000 yd |
| Scope click equivalence at 1000 yd | **< ¼ click** | Standard 0.1 MRAD scope; 0.025 mil = ¼ click |

### What these numbers mean to a shooter

At 1000 yards, a standard precision rifle scope clicks in 0.1 MRAD increments. ScopeDOPE's G7 engine computes the firing solution to within **one-quarter of a single click** of the JBM reference standard. With your DOPE dialed in, real-world prediction error is less than **2.3 inches at 300 yards** — that's inside a half-MOA group at that distance.

---

## 3. Key Differentiators

### "Learns from your rifle, not a spreadsheet"

Every barrel, every lot of ammo, every scope is slightly different from the manufacturer's specifications. ScopeDOPE measures that difference at the distances you've shot and bridges the gap at the distances you haven't. Three confirmed impacts are all it takes to build a corrected curve — once you have them, the app smoothly interpolates across every distance in between, with no overshoot between data points.

### "Correct physics is the floor, not the product"

Every serious ballistics tool uses the same G7/G1 drag model. ScopeDOPE does too — implemented against the identical McCoy tables used by JBM Ballistics, verified to agree within instrument precision. That is not a feature. That is the minimum bar for a tool the precision community will trust.

The feature is what ScopeDOPE does next: correct that physics curve with your actual fired data.

### "Validated. Not just tested."

Most apps are tested: the developer runs some numbers, they look right, done. ScopeDOPE runs an exhaustive mathematical validation:

- **Thousands of combinations tested per load** — not just leave-one-out, but every possible subset of training data (C(N,k) for all k)
- **Real-world fired data** — not just calculated references — used as the accuracy benchmark
- **Documented methodology** — the full validation suite is exhaustive and the approach is reproducible

### "No internet required. Ever."

All calculations run entirely on-device. Your firing solution does not leave your phone. There is no subscription, no server, no dependency on connectivity in the field.

### "One engine. Android and iOS."

The exact same ballistic engine powers both iOS and Android. Under the hood they are the same — not two versions kept in sync, not a port. The same engine, the same math, the same results. Every accuracy improvement applies to both platforms the moment it ships.

---

## 4. Messaging by Audience

> **Scope note.** ScopeDOPE is positioned for **NRL22 and PRS competitors** (see SCOPEDOPE_MARKETING_GUIDE.md §1.1, §4.2). Do not write hunting copy, and do not market ScopeDOPE as a military or law-enforcement tool. The audiences below are competition-shooter segments and the technically-skeptical reviewers who serve them — not separate verticals.

### PRS / Competition shooters

*"Your DOPE card is already your most trusted tool. ScopeDOPE starts with the same physics model the serious community uses — JBM's G7 standard — then applies your actual fired data as a correction layer. Drop corrections at distances you've shot are exact. Drop corrections at distances you haven't shot are smoothly interpolated between your known data points — following the shape of your actual curve, not a straight line between them. When conditions change, one tap updates the firing solution for every distance on your card."*

### NRL22 / Rimfire competitors

*"Rimfire punishes lazy data. Lot-to-lot velocity swings that wouldn't matter at 100 yards open into clean misses at 200. ScopeDOPE corrects the solution from your confirmed impacts on the exact lot you're shooting — not a published BC that knows nothing about your barrel. New barrel, new lot, fresh DOPE: the app rebuilds the card from the impacts you record."*

### Technical skeptics / Gear reviewers

*"ScopeDOPE solves the G7/G1 point-mass trajectory against the McCoy drag tables — the same standard cited in Bryan Litz's Applied Ballistics for Long Range Shooting, and the same model behind JBM Ballistics and Kestrel/Applied Ballistics tools. It is not a wrapper around existing software; it is a from-scratch solver, independently cross-checked against JBM and validated against confirmed real-world fired data. The validation suite runs exhaustive C(N,k) cross-validation across 22 test cases spanning rimfire through .300 Win Mag, and the methodology is documented and reproducible. Mean prediction error against field-fired impacts, with DOPE-Blend correction applied: 0.063 mil. The shared physics is the floor; the correction from your own impacts is the product."*

---

## 5. What NOT to Claim

These are inaccurate or unverifiable — do not use them:

| ❌ Do not say | Why |
|---|---|
| "Most accurate Ballistic Computer" | Superlative not validated against all competitors |
| "Matches real-world data at all distances" | Only validated at 150–300 yd (transonic zone); longer-range fired data not yet collected |
| "Better than Kestrel / Applied Ballistics" | No head-to-head comparison run; AB uses custom drag models we don't yet implement |
| "Sub-MOA accuracy" | Accuracy is in mils, not MOA groups; confuses correction precision with rifle precision |
| "Works perfectly for subsonic loads" | G1 model physically degrades for fully subsonic bullets; DOPE correction required |
| "Exact to 1000 yards" | Not validated with fired data at 1000 yd; cross-calculator only at long range |

---

## 6. One-Liners

Pick the right one for context:

- **General:** *"Physics-based. Field-validated. Learns from your rifle."*
- **Technical:** *"G7/G1 point-mass solver. JBM-equivalent accuracy. DOPE-corrected for your rifle."*
- **Short form:** *"Your DOPE, on a sticker."*
- **Accuracy-focused:** *"0.063 mil mean error. Field-fired. Documented."*
- **Differentiator:** *"The Ballistic Computer that corrects itself."*

---

## 7. App Store Copy (Draft)

### Short description (30 words)
Precision rifle firing solutions built on your confirmed impacts — DOPE-Blend field-correction over a G7/G1 physics core. Niimbot sticker printing, WeatherFlow Tactical sensors. Field-validated. No subscription. No internet required.

### Long description
ScopeDOPE computes elevation and windage corrections for precision rifle shooting, then does what a calculator cannot: corrects them with your own confirmed DOPE. The physics core is the G7/G1 point-mass drag model — the same standard as JBM Ballistics and Applied Ballistics tools. DOPE-Blend field-correction is what makes the solution yours.

**Correction that actually works.**
Enter your confirmed impacts at any distances and ScopeDOPE builds a smooth correction across your entire firing card — exact at the distances you've shot, faithfully interpolated across the ones you haven't. Validated against real-world field-fired data: mean prediction error 0.063 mil with DOPE-Blend applied.

**Physics you can trust underneath.**
The solver implements the McCoy G7/G1 drag tables, cross-verified against JBM Ballistics. Interior interpolation accuracy is better than ¼ of a standard 0.1 MRAD scope click across the full supersonic range. Correct physics is the floor — the price of admission for a tool the precision community will trust.

**Live conditions, automatically.**
Pair with the WeatherFlow Tactical over Bluetooth — no WiFi, no hotspot. Wind speed, wind direction, temperature, humidity, and pressure feed directly into your firing solution. The WeatherFlow's built-in compass means wind angle is computed automatically relative to your firing direction. No manual lookups, no guessing.

**Built for ELR.**
Coriolis correction is built in — enable it once, capture your latitude, and it adjusts every firing solution automatically based on your compass heading. Dial in your firing angle for uphill and downhill shots and the engine applies the inclined-fire correction. The things that matter at distance are accounted for.

**Built for the field.**
All calculations are on-device. No internet, no subscription, no server. Also connects to the BTMETER BT-100APP Bluetooth anemometer and Niimbot B1 and B21 Pro thermal printers for a complete field kit.

**For NRL22 and PRS competitors, and anyone who takes their data seriously.**

---

## 8. Social Media Angles

**Credibility angle:**
*"We ran 8,099 combination tests on a single .300 Win Mag data set to validate the DOPE interpolation engine. Eight thousand ninety-nine mathematical combinations — on top of real-world fired data."*

**Real-world validation angle:**
*"Three shots. 150, 200, and 300 yards. Confirmed fired impacts — including through the transonic zone. Mean prediction error: 0.063 mil."*

**Differentiator angle:**
*"Other apps give you what the manufacturer says the bullet should do. ScopeDOPE starts there, then adjusts for what your rifle actually does — barrel, ammo lot, scope mount, all of it. There's a difference."*

**Technical credibility angle:**
*"Same G7 drag model as JBM Ballistics. Verified node-by-node against the McCoy table. No approximations, no 'close enough.' The math is the math."*

---

## Document Control

| Field | Value |
|---|---|
| **Document owner** | `jschwefel@coldboreballisticsllc.com` |
| **Classification** | Highly Confidential (04_-_Highly_Confidential/) |
| **Location** | `OneDrive/ScopeDOPE/04_-_Highly_Confidential/Marketing_Guide/MARKETING_ENGINE.md` |
| **Cross-references** | `SCOPEDOPE_MARKETING_GUIDE.md`; `SCOPEDOPE_COMPETITIVE_ANALYSIS.md` |
| **Created** | 2026-06-01 |
| **Last updated** | 2026-06-09 |
| **Next full review due** | 2027-06-01 |

---

## Revision Control Block

| Rev | Date | Changed By | Reviewed By | Approved By | Summary |
|-----|------|------------|-------------|-------------|---------|
| 0.9 | 2026-06-01 | jschwefel | — | — | Initial release |
| DRAFT | 2026-06-09 | Claude (Opus 4.8) | — | — | Reframed the doc per Competitive Analysis guidance and BRAND_LEGAL: physics engine repositioned as the credibility floor, DOPE-Blend™ field-correction as the differentiator/story; added a "read first" positioning note. Removed banned framing of DOPE-Blend as "the engine." Cut the "Long-range hunters" and "Military/LE" audience sections (conflict with SCOPEDOPE_MARKETING_GUIDE §2.5/§4.2 competition-only positioning); added an NRL22/Rimfire competitor segment and folded the Litz/McCoy credibility material into the Technical-skeptics segment. Removed trade-secret methodology internal ("monotone cubic spline") from copy per CLAUDE.md trade-secret guard. Added an integrity caveat to the 0.063 mil headline (n=3, single rifle — defensible only as stated). Reworked app-store long description to lead with correction over physics; removed "long-range hunters" closer. Applied ™ to first use of ScopeDOPE, Ballistic Computer, DOPE-Blend. Removed header version number per Document-version policy. |
