Strelok Internal Ballistics

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/°F) 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. • 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 the 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. Copyright © 2026 Strelok LLC. All rights reserved. "Strelok", "Strelok Pro" and "Strelok QuickLoad" are trademarks of Strelok LLC. Important: Strelok Internal Ballistics is a completely new application, built from the ground up with an original codebase and a modern feature set. It is not an update to or a continuation of any previous application that may have been available on the Google Play Store, and it is not affiliated with, endorsed by, or associated with any previous application, developer, or publisher that has used the name "Strelok" or similar branding.