Chrono String
Velocity (fps)
Shots
Tap a shot to remove it.
Calculator only. This app contains no load data. Enter the published maximum from your manufacturer's manual and never exceed it.
DOPE Card
Rifle & bullet
Drag model
Distance unit
Conditions
Holds in
Starting data only. Point-mass G1/G7 solver; no spin drift or Coriolis. Station pressure is the actual (unadjusted) pressure where you stand, not the sea-level barometer from a weather app. Confirm every hold on paper and write confirmed DOPE in your logbook.
Group Size
Size unit
Distance unit
1 MOA = 1.047 in at 100 yd. 1 MIL = 1 unit at 1,000 units (3.6 in at 100 yd).
Mil / MOA Ranging
Unit
Reticle
Road signs are for ranging only. Shooting them is a crime.
Round Count
Log the total on the Round Count & Maintenance page of your logbook after each session.
More
Cost per RoundReload vs. factory, savings, payoff Get the LogbooksThe paper books this app was built for Settings & DataTheme, export, clear About & SafetyInstall help, formulas, safetyCost per Round
Bullets
Powder
Primers
Brass
Compare
Track every load in the Underground Tactical Reloading Workbook.
Get the Logbooks
Apps crash. Batteries die. Your DOPE book doesn't lie.
Settings & Data
Display
Your data
Everything stays on this device. No account, no server.
About
Where every day is Range Day.
Safety
This is a calculator only. It contains no load data and never suggests charges. Always follow published manufacturer load data, start low, work up carefully, and never exceed published maximums. Ballistic output is a starting estimate; confirm it with live fire before relying on it.
Install
iPhone / iPad: open this page in Safari, tap Share, then Add to Home Screen.
Android: open in Chrome, tap the menu, then Install app or Add to Home screen.
Privacy policy: this app collects no data.
Version · © Underground Tactical