IBC is a physics-based internal ballistics calculator that runs in your browser. Pick a load from your reloading manual, type it in, and the calculator predicts velocity and peak pressure, draws the pressure curve, and gives the load a verdict against the cartridge's pressure ceiling. It also computes trajectory and drop, and it keeps a logbook of the loads you save. Nothing to install. It works on a phone at the bench.
The part most simulators skip: IBC checks itself against a corpus of thousands of published loads from printed reloading manuals, and it publishes the error rates (overall, per powder, and per cartridge) with the method and provenance next to the numbers. When the calculator tells you a load reads 3% under your manual's velocity, you can look up how wrong predictions like that one usually are.
QuickLOAD is the long-standing desktop program for interior ballistics, and its cartridge library is bigger than ours. Per the Neconos product page it covers 1,200+ cartridges against our 607, along with wildcat cartridge design, chronograph-based powder calibration, and a bundled exterior module. Those are real capabilities. Some of them IBC does not have yet, and this page will say so rather than pretend otherwise.
The practical differences:
| IBC | QuickLOAD/QuickTARGET |
|---|---|
| Runs in any browser, phone included. Free tier: full single-load predictions, trajectory, and the first steps of a work-up ladder. PRO is $17.99/month. | $174.95 one-time for Windows, shipped on a physical disc, per Neconos's own product page. Windows-only; the same page rules out Win11-ARM. |
| Publishes measured error rates against a published-manual corpus, per cartridge and per powder. | Accuracy is not published in comparable form. |
| Every load gets a safety verdict against the cartridge's pressure ceiling, and the warnings are never behind the paywall. | You read the numbers yourself; there is no per-load verdict. |
| Trajectory and drop tables included; logbook included. | QuickTARGET handles exterior ballistics; loads are files on your disk. |
| No wildcat designer, no chronograph calibration, and the cartridge catalog is rifle-focused (607 rows). | Has the wildcat designer, chrono interfaces, and a larger library. |
If you want to sanity-check a manual load before you load it, compare a powder change without burning components, or see the pressure curve behind a charge step, IBC does that in the time it takes a browser to open. If you need to design wildcat cartridges from scratch or tune the model against your own chronograph, QuickLOAD still earns its price and IBC is not there yet.
IBC is a comparison tool, not a load table. It does not publish loads: start from a load in a current reloading manual, enter it, and compare. Start 10% below the maximum charge and work up. Competitor facts on this page come from the vendor's own public product page at neconos.com; we make no claims about their internals.