Grayboe vs Strelok Internal Ballistics

Turn your range time into measurable improvement with Grayboe — the AI-powered shooting analysis app that transforms target photos into actionable data. INSTANT SHOT ANALYSIS Simply photograph your target. Our AI automatically detects bullet holes and calculates group size, extreme spread, and distance from point of aim — all in MOA and inches. AI TARGET CALIBRATION Use our printable AI targets for automatic scale calibration. No manual measuring required. Just shoot, snap, and analyze. MANUAL TARGET SUPPORT Don't have an AI target? No problem. Analyze any target by manually setting the scale and point of aim. TRACK YOUR PROGRESS See your accuracy improve over time with trend analysis across sessions. Compare performance by firearm, ammunition, and shooting conditions. MANAGE YOUR EQUIPMENT • Log all your firearms with detailed specs • Track ammunition inventory and costs • Monitor maintenance schedules • Record environmental conditions for each session DETAILED METRICS • Group size in inches and MOA • Windage and elevation from POA • Shot-by-shot distance analysis • Multi-target comparisons CLOUD SYNC Create a free account to back up your data and sync across all your devices. Your shooting history, firearms, and ammunition data — always accessible. PRINT AI TARGETS Generate and print precision AI targets optimized for automatic detection. Available in multiple formats for different training purposes. Whether you're a competitive precision shooter, long-range hunter, or dedicated hobbyist, Grayboe gives you the data you need to improve every time you pull the trigger. Download now and start shooting smarter.

Strelok Internal Ballistics is the mobile Quick Load: an interior-ballistics workbench for precision handloaders. It's the load-development companion to Strelok Pro — Pro solves the bullet in flight, this app helps you build the cartridge, and predicts what that cartridge will actually do before you ever pull the trigger. PREDICT YOUR LOAD — ON DEVICE - Pick a cartridge, powder and bullet, and the engine predicts muzzle velocity, peak chamber pressure and case fill across the whole charge range. - A live chart plots velocity and pressure against the SAAMI/CIP maximum, with a clear over-pressure warning zone. - The engine is fit to 34,000+ published loads and runs entirely on your device — no signal needed at the bench. CALIBRATE IT TO YOUR RIFLE - Enter the velocities you actually chronographed and the engine tunes itself to your barrel and powder lot, so every prediction is personalized — not a generic table. LOAD LAB — YOUR DATA, SMARTER - Find your velocity node (the flat spot / OCW window) and your lowest-spread charge automatically. - Track powder temperature sensitivity (fps/degF) and barrel round-count and life. - The more you log, the sharper your load development gets. A REFERENCE THAT WORKS OFFLINE - 34,000+ published loads across 519 cartridges and 100+ powders, normalized from Hodgdon, Vihtavuori, Alliant and Norma data. - Browse by cartridge, then filter by bullet weight and powder — start/max charge, velocity, pressure and COAL, with SAAMI/CIP context. The whole catalog lives on your device. A SMARTER LOGBOOK - Record loads with full component detail and chronograph strings. - Automatic statistics: average velocity, standard deviation (SD) and extreme spread (ES). - Track rifle profiles and your powder, primer, brass and bullet inventory. PART OF THE STRELOK ECOSYSTEM - One Strelok account works here and in Strelok Pro. - Develop a load here, then send it to Strelok Pro with its measured muzzle velocity (Rifles > Import from Reload on the Pro side). - Strelok Cloud keeps your logbook, rifles and developed loads in sync across devices. BUILT FOR SAFETY Predictions are a development aid, not published load data. The app always shows the start charge, clamps and warns against SAAMI/CIP maximum, and reminds you to start low and work up while watching for pressure signs. Always cross-check against your component manufacturer's current data. This app is not a maximum-charge authority — you are responsible for safe reloading practice. FREE & PRO Free: browse the full catalog, keep your logbook, and run the prediction engine. Pro adds chrono calibration and Load Lab analytics — monthly or yearly subscription (7-day free trial), or a one-time Lifetime purchase. Subscriptions auto-renew unless cancelled at least 24 hours before the period ends; manage or cancel anytime in your App Store account settings. Terms of Service: https://strelokpro.com/terms Terms of Use (EULA): https://strelokpro.com/eula Privacy Policy: https://strelokpro.com/privacy