trajex vs ReloadVault

Trajex is a serious exterior ballistics calculator for precision rifle shooters and handloaders. Built around two real solvers — a Modified Point-Mass engine for fast field solutions and a full 6-Degree-of-Freedom rigid-body solver for extreme-range and transonic work — it gives you the math the load actually deserves. No subscriptions. No accounts. No ads. No telemetry asking you to log in to see your own data. TWO TRAJECTORY ENGINES • Modified Point-Mass (MPM) — fast, accurate solutions for normal shooting envelopes using G1 or G7 ballistic coefficients. • 6-DoF rigid-body solver — full angular dynamics for long-range, high-angle, and transonic regimes where point-mass models break down. Choose the engine per shot. Compare the difference on the same chart. BULLET & LOAD MANAGEMENT • 1,279-bullet database spanning 15 major manufacturers, with G1 and G7 BCs where published. • Build rifles with photos, twist rate, sight height, zero range, and scope configuration. • Manage loads as rifle-independent recipes linked by cartridge — one load works across every rifle chambered for it. • 405-cartridge CIP catalog with 401 official TDCC specification PDFs for dimensional reference and load workup. ATMOSPHERE THE WAY IT ACTUALLY IS • One-tap GPS location capture. • Live atmospheric data from Open-Meteo: pressure, temperature, humidity, wind speed and direction. • Or enter conditions manually when you're underground, off-grid, or just don't trust the forecast. Coriolis effect and gyroscopic spin drift are computed automatically from your latitude, azimuth, and bullet spin — not toggled on as a gimmick. RESULTS YOU CAN ACT ON • Drop, windage (left/right), remaining velocity, energy, and time of flight at every range step. • Interactive trajectory chart with separate ELEVATION and WINDAGE views — drag along the curve to read any range. • SCOPE tab renders your reticle with true MOA or MIL graduation, showing the holdover and wind hold for the target distance. • Imperial and metric units, switchable globally. BUILT FOR THE BENCH AND THE FIELD • Dark "precision-instrument" interface designed to be readable at the bench, in the truck, and on the line. • Local-first storage. Your rifles, loads, and zero data live on your device. • Backup and restore that MERGES — restoring a backup never deletes what's already there. Move between devices without fear. WHO THIS IS FOR Trajex is built for handloaders, F-Class and PRS competitors, hunters working past 600 yards, and anyone who reads "BC at Mach 1.2" and wants to know which model the number came from. If you've ever squinted at a free ballistics app and wished it had the math, the data, and the discipline of a real tool — this is that tool. WHAT TRAJEX IS NOT It is not a rangefinder. It is not a wind meter. It does not pretend your phone's barometer is a Kestrel. It will not upsell you a "pro" tier to unlock features you already paid for — because you didn't pay anything. Free. Built by a shooter, for shooters. Feedback welcome

Never lose a load again. ReloadVault is a 100% offline reloading logbook for iPhone. No account. No cloud. No subscription. Every load, batch, chronograph string, group, and target photo stays on your device — and exports anytime to a single backup file, CSV, or printable pages you own forever. YOUR LOGBOOK • Everything about a load in one place: recipe, batches, range results, best group, and best SD • Chronograph stats (average, extreme spread, standard deviation) computed as you type — or paste a whole string of velocities from your Garmin Xero, LabRadar, or MagnetoSpeed export and every shot is added at once • Group size in inches and MOA, with distance, temperature, humidity, wind, and a target photo • Inventory that deducts itself when you log a batch; one tap returns brass and counts the firing • Per-round cost from your real component prices, and savings versus factory ammo • 100+ built-in cartridges, from .17 Hornet to .50 BMG, plus your own LOAD DEVELOPMENT, CHARTED Loads that share a cartridge, bullet, and powder are grouped into a ladder. ReloadVault plots your measured velocity (with SD bars) and your best group against charge weight, and every load with two or more chronographed sessions shows a velocity trend. It charts what you recorded — it never proposes a charge. AMMO BOX LABELS Print any batch as a 4×2 in label: load, bullet, powder and charge, primer, brass, COAL, firearm, date loaded, and count. Fits Avery 5163-compatible sheets, or one per page for label printers. BENCH TOOLS • Bullet stability and twist rate — will this bullet stabilize in your barrel? • Free recoil energy, to compare what two loads will actually feel like • Muzzle energy, momentum, sectional density, ballistic coefficient • Case capacity and load density from your own water-weight measurement • Charge ladder planner that spaces out a work-up between the starting and maximum charge in your own manual Every tool names the published formula it uses, on screen. None of them produce, adjust, or recommend a powder charge. YOUR REFERENCE LIBRARY Load-data publishers require written permission before their data can ship inside an app, so ReloadVault starts with an empty library rather than unlicensed or invented numbers. Build your own from the manuals you already own — every row keeps its source citation and is searchable by cartridge, bullet weight, and powder. Rows you enter are always fully visible, on every tier. YOUR DATA IS YOURS One-tap backup of everything, photos included. Email it to yourself, drop it in Files, keep it forever. Backup, restore, and CSV export are free on every tier — we never hold your data hostage. FREE: full logging for 2 firearms and 5 loads, every bench tool, inventory, range log, and all exports. RELOADVAULT PRO ($14.99 one time — not a subscription): unlimited firearms, loads, and inventory; load development charts; printable box labels; the complete charge ladder planner; and PDF export. Handloading ammunition is inherently dangerous. ReloadVault is a personal record-keeping tool, not a reloading manual, and nothing in it is advice. Always verify every value against current manufacturer published data, start at the published starting charge, and work up carefully. ReloadVault is an independent app, not affiliated with or endorsed by any powder, bullet, or firearm manufacturer.