trajex vs BenchLog

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

BenchLog is a reloading journal built for handloaders who take load development seriously — and who want their data to stay on their own device. Log every load, track what each charge actually does downrange, and work up to the load your rifle likes best. No account. No cloud. No subscription. ALREADY KEEP A SPREADSHEET? BRING IT. Import your load log from CSV. Map the columns yourself — BenchLog shows sample values from each one so you can tell them apart — and check the preview before anything is saved. Headers split across two rows are handled. Columns it has no field for go into the load's notes instead of being dropped. Nothing is written until you say so. LOG YOUR LOADS • Record caliber, bullet, powder, charge, primer, brass, OAL, CBTO and notes • Duplicate a load to work up the next charge in one tap • Version history keeps every step of a workup • Yellow flag when a charge tops your own logged max TRACK EVERY RANGE SESSION • Enter velocities by hand or import a chronograph CSV • No chronograph? Enter the number of rounds fired — inventory and barrel round count follow it • Live average, SD and ES as you go • Group size, MOA, distance, weather and a keeper / retest / reject verdict • Photo of the group KNOW YOUR BARREL • Round count for every barrel, built from the sessions you already log — free • Started mid-life? Enter what the barrel had on it before BenchLog • Sessions on loads without a barrel are never folded into the count • Sessions with no round count are marked, not silently counted as zero • PRO: cleaning log — set "clean at N rounds", see the count since the last cleaning, and keep every cleaning with the round count it was done at SEE YOUR LADDER • Charge vs. velocity chart across a workup • Seating depth test: switch the axis to CBTO and chart group size against cartridge length • Tap any point for its MOA and distance • SD at a glance to spot the flat spots KNOW YOUR INVENTORY • Track powder, bullets, primers and brass with cost • "Rounds left" forecast from your average charge • Low-stock flags EXPORT & BACK UP • Printable PDF load book • CSV export of loads, sessions, components and barrel cleanings • Full backup to a single file — and restore it anytime BUILT RIGHT • 100% offline — everything works at the range with no signal • No account, no tracking, your data never leaves the device unless YOU export it • Free forever: your range log, group measurement, ladder charts, inventory, barrel round count, import and export, and your first 10 loads • One-time purchase — BenchLog Pro — unlocks unlimited loads, the barrel cleaning log, the season summary and the result card, with more Pro tools as they land. No subscription, ever. BenchLog stores YOUR records only. It is not load data. Always verify charges against a current published reloading manual. Start low and work up. You are responsible for your loads.