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, made for the range and the hunt. Use it for supersonic and subsonic .300 Blackout, a match load and a hunting load, or any two rounds you shoot from one zero. Or use it with just one. 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". • Only one load? Turn off the second round, and the headline and dope card show its velocity, energy and time of flight instead. • The solution updates live as you type. YOUR HOLD ON YOUR WRIST • When your buck steps out, there's no phone to dig out: the Apple Watch app has your holds on your wrist. • Range it, turn the Digital Crown to the distance, 5 yards at a time, and read the elevation and windage holds. • Set up target cards for your shooting lanes before the hunt, and each one's hold is a swipe away. • Windage follows the watch's compass, so you can face the deer and read the hold. • Your setup stays on the watch, so it works with your phone left in the truck. • Tap a round to change its muzzle velocity, or the wind to set it. Changes go back to your iPhone. • Weather Updates fetch the weather where you are every 15 minutes while it's open, and today's sunrise and sunset sit beside the clock. READ DOPE AT ANY RANGE • Drag across the trajectory chart for drop at any yard; 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 • Browse your cartridge's factory loads, with published ballistic coefficients and muzzle velocities, many with bullet length and a G7 BC. • Search or filter supersonic and subsonic, then tap a load to use it. TARGET CARDS • Add the targets you'll shoot at, each with its distance, angle and direction, and see both loads' holds for every one. • Shoot uphill or downhill: holds are worked out along the line of sight, as your rangefinder reads it. • Point your iPhone at a target to fill in its direction and angle. Give a target a direction, and with the wind's direction set, it gets its own wind clock. TRUE YOUR BC • Add the groups you fired past your zero: the elevation you dialed or where each landed, with your chronograph velocity and that day's conditions. • OneZero fits the ballistic coefficient that matches them all and shows how firmly they pin it down. Use it, or save it to your load. WIND FROM YOUR COMPASS • Use Current Weather fills in temperature, humidity, pressure and altitude, and 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 and the shot angle. You can still pick them by hand. PHYSICS YOU CAN CHECK • Standard G1 and G7 drag tables indexed by Mach number. • 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. • 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. • Uphill and downhill shots, with gravity split along and across the line of sight. MADE FOR THE RANGE • Save rifles and loads as presets and switch between them in a tap. • Share a PDF dope card with your 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