Help & Quick Start

Straight answers. Do it right, hit more. If anything here doesn’t match what you see in the app, tell us and we’ll fix the app—not your expectations.

Table of Contents

• Install & First Run
• Units & Defaults
• Rifle Profiles
• Calculator Workflow
• TRY / TRUE Method
• Rimfire vs. Centerfire
• Wind Logic (Factory BC or GE)
• Weather, Heading, Density Altitude
• Spin Drift (Optional)
• PDF Range Cards & Email
• Data, Offline Behavior & Privacy
• Troubleshooting
• FAQ
• Contact

Install & First Run

• Grant permissions when asked:
  • Location: finds nearest weather station for temp/pressure/humidity/wind/elevation.
  • Compass/Sensors: for heading-relative wind.
• You can deny permissions and still use the app; enter weather manually if needed.
• Default mode is Centerfire with dark theme. Switch anytime.

Units & Defaults

• Pick MIL or MOA. Output is single-decimal (e.g., 1.1 MIL / 2.9 MOA).
• Pick Yards or Meters — table follows your choice.
• Wind units: MPH or m/s.

Rifle Profiles

• Save rifles (and optional handloads). Switch fast—no bloat.
• Profiles store basics for drop output; calculator also works without a saved rifle.
• Your data is stored locally on your device.

Calculator Workflow

1. Select Centerfire or Rimfire.
2. Confirm units (MIL/MOA, yards/meters).
3. Pull weather (auto) or enter it manually.
4. Zero row:
   • Centerfire: 100 (TRY = 0.0).
   • Rimfire: 50 (TRY = 0.0).
5. Work down the table. If reality differs, enter that in TRUE; downstream rows update.

TRY / TRUE Method

TRY = calculated hold. TRUE = what you actually needed on target.

• Enter your real correction in the TRUE column at any distance.
• The app cascades that correction to later distances (downstream) to keep the table coherent.
• Single-decimal outputs on purpose—fast to dial, easy to hold.

Rimfire vs. Centerfire

• Centerfire
  • Zero at 100 fixed at TRY = 0.0.
  • Table: 200 → 1000 in 100-yard (or meter) steps.
• Rimfire
  • Zero at 50 fixed at TRY = 0.0.
  • Table: 100 → 400 in 25-yard (or meter) steps.
  • Velocity-based shaping with interpolation between distances.

Wind Logic (Factory BC or GE)

Two paths to honest wind holds. Use a factory G1 BC if you have it. If not, use GE (our mph-gun style estimator) driven by your observed corrections.

• Factory BC (G1)
  • Enter BC in “Enter Factory BC or Calculate BC.”
  • Wind holds use BC plus your drop/time-of-flight model.
  • Advanced users: you can also use a “gun number” style quick-ref derived from BC.
• GE (mph-gun estimation)
  • If BC is blank, GE estimates wind sensitivity (mph-gun) from your TRUE’d data and timing.
  • Lets you get solid wind calls even if published BCs are unreliable.

Bottom line: provide a real BC when you can; otherwise, confirm a few drops and let GE learn your rifle.

Weather, Heading, Density Altitude

• Weather: nearest station via OpenWeather APIs; you can override manually.
• Heading: lock shooting direction; wind becomes relative to your muzzle, not just “north”.
• Density Altitude: computed from station conditions + elevation, so drops hold across temp/pressure swings.

Spin Drift (Optional)

• Enable to add small lateral correction at distance.
• If you don’t want it, leave off—some shooters bake it into zero/holds.

PDF Range Cards & Email

• Create a PDF from the calculator screen.
• Works with or without a selected rifle. With a profile, details are embedded; without, you still get dope + weather.
• No email client? The app falls back to a safe share/open method.

Data, Offline Behavior & Privacy

• Your rifle/ammo/dope data stays local on your device.
• No ads, no trackers, no social pixels.
• Weather calls send coarse coordinates or a station/city ID—no personal identifiers, no ballistics data.
• Offline? Use cached conditions or enter weather manually. Calculators still work.

Troubleshooting

• No weather? Check location permissions or enter weather manually.
• Wind looks wrong? Lock heading, verify wind units (MPH vs m/s), and either enter a factory BC or shoot a couple of TRUEs so GE stabilizes.
• PDF won’t email? Install any email client or use the share/open fallback.
• Numbers feel off? Confirm mode (Rimfire vs Centerfire) and units (yards/meters, MIL/MOA). Re-enter TRUE at one verified distance; downstream rows will correct.

FAQ

• Do I need velocity for centerfire? No. Centerfire uses a simplified, proven model keyed to real drops.
• Why single-decimal outputs? Faster to dial, faster to hold. Real-world speed beats false precision.
• Can I set a non-standard zero (e.g., 175 yards)? Yes—use the zero offset tool when enabled in settings.
• G7 BC? Optional. Run G1 or convert—don’t overcomplicate if you don’t need to.

Contact

Email: [email protected]