OneZero Ballistics Calculator vs Loadem

Zero your rifle with one load and know exactly where a second load will hit, without touching your sights. OneZero is a ballistic calculator for 139 cartridges, from .17 HMR to .50 BMG. Use it for supersonic and subsonic .300 Blackout, a match load and a hunting load, or any two rounds you shoot from one zero. SEE THE SHIFT • Pick a zeroed round and a Round 2, and both fly from the same zero. • The headline shows where Round 2 lands at your distance and the hold to correct it: "12.3 in low · Hold U 11.7 MOA". • The solution updates live as you type. No Calculate button. READ DOPE AT ANY RANGE • Drag across the trajectory chart for drop at any yard. The readout stays put when you lift your finger. • Pinch to zoom, and switch between drop and drift. • The dope card lists up, down, left and right corrections for both loads, plus the shift between them, in MOA or MIL. 4,266 FACTORY LOADS BUILT IN • Pick your rifle's cartridge and browse its factory loads, with published ballistic coefficients and muzzle velocities. • Many include bullet length for stability and spin drift, and a G7 ballistic coefficient where the bullet has one. • Search or filter supersonic and subsonic, then tap a load to use it as your zeroed round or Round 2. WIND FROM YOUR COMPASS • Use Current Weather fills in the wind's speed and the direction it blows from. • Tap Target Direction and point your iPhone at the target, and OneZero works out the wind's clock direction. You can still pick it by hand. ON YOUR WRIST • The Apple Watch app shows the elevation and windage holds for both rounds from your iPhone's setup. • Turn the Digital Crown to step through distances 5 yards at a time. • The windage holds follow the watch's compass, so you can face the next target and read the hold. • Today's sunrise and sunset sit beside the clock, and your setup stays on the watch when your phone doesn't. PHYSICS YOU CAN CHECK • Standard G1 and G7 drag tables indexed by Mach number, the same reference data used by established ballistic solvers. • Air density from station pressure, temperature and humidity, with density altitude and speed of sound shown. • Wind from any direction: crosswind drift by the lag-time method, and head and tail winds in the drag. The wind's clock direction is picked by hand or worked out from compass bearings. • Miller stability and spin drift from your cartridge's bullet diameter, bullet length and barrel twist, corrected for muzzle velocity and air density. • Coriolis from your latitude, with its vertical part for the target's direction. MADE FOR THE RANGE • Use Current Weather fills temperature, humidity, pressure, altitude and wind from Apple Weather for your location. • Save rifles and loads as presets and switch between them in a tap. • Share a PDF dope card with both loads, ready to print. • On iPhone Duo, see Setup and the live solution side by side, split at the fold. • Dark mode and full VoiceOver support. Always confirm your dope with live fire before relying on it. Weather data provided by Apple Weather.

Load'Em is the ultimate companion app for shooting enthusiasts, reloaders, and hunters. Whether you're developing the perfect ammunition load, tracking your firearms collection, planning your next hunting trip, or logging shooting sessions, Load'Em has you covered. KEY FEATURES: FIREARMS MANAGEMENT • Maintain a detailed inventory of your firearms • Track serial numbers, calibers, and specifications • Upload photos and documentation • Manage firearm licenses with expiration alerts • Track optics and zero settings for each firearm RELOADING TOOLS • Create and save ammunition reloading recipes • Track components: primers, powders, bullets, and brass • Manage inventory levels and get low-stock alerts • Calculate loads and track performance data • Load development tracking with statistical analysis • Import/export recipes to share with friends BALLISTICS CALCULATOR • Calculate trajectory and drop • Analyze target photos for group sizing • Compare different ammunition loads • Wind drift and elevation adjustments CLOUD SYNC & BACKUP • Automatic cloud synchronization via Firebase • Access your data across multiple devices • Secure backup of all your information • Offline-first design - works without internet PRIVACY & SECURITY • Your data belongs to you • Optional cloud sync for backup • Secure authentication with Google Sign-In • Local storage with SQLite for offline access PERFECT FOR: • Sport shooters tracking performance • Reloaders developing custom ammunition • Hunters planning trips and logging harvests • Firearms collectors managing inventory • Competitive shooters analyzing results • Anyone passionate about shooting sports PREMIUM FEATURES (Optional): • Advanced ballistics calculations • Unlimited recipe storage • Priority cloud sync • Ad-free experience • Early access to new features WHY CHOOSE LOAD'EM? • Comprehensive all-in-one solution • Intuitive, easy-to-use interface • Regular updates and improvements • Responsive customer support • Built by shooting enthusiasts, for shooting enthusiasts SAFETY FIRST: Load'Em includes safety reminders and follows industry-standard reloading practices. Always follow manufacturer guidelines and safety protocols when reloading ammunition. Download Load'Em today and take your shooting hobby to the next level! Coming soon: SHOOTING SESSION LOGS • Record shooting sessions with detailed notes • Track accuracy, conditions, and ammunition used • Analyze performance trends with charts and graphs • Compare different loads and firearms • Export session data to PDF or CSV HUNTING TRIP PLANNER • Plan hunting trips with GPS mapping • Mark hunting zones and stand locations • Track weather conditions for optimal hunting • Log successful hunts with photos and notes • Review past hunting seasons and locations LEARNING CENTER • Educational content for new reloaders • Safety guidelines and best practices • Reloading techniques and tips Terms of Use: https://elcolynx.com/terms.html