PelletArc is airgun-first, but it carries RA4 — a dedicated rimfire drag model sourced from JBM Ballistics — for .22LR. Solve your drop on rimfire physics, true the ballistic coefficient to your ammo and barrel, and read the holdover in mil, MOA or cm. Fully offline, pay once.
Two things make rimfire hard for a generic calculator: where the bullet flies, and how much its speed wanders. PelletArc is built to answer both.
Through much of its flight, standard-velocity .22LR is close to the speed of sound — the regime where drag changes quickly and drop is most sensitive to small errors. A single generic curve struggles there. RA4 is a purpose-built rimfire drag law for exactly that part of the trajectory, so the solve sits on rimfire physics instead of a borrowed shape.
Rimfire muzzle velocity is famously variable — one brick of ammo to the next, and one barrel to another. That is why your real drops rarely match a printed chart. PelletArc answers it with BC truing: calibrate the coefficient from the drops you actually see, so the numbers describe your tin and your rifle, not someone else's.
Pick RA4 and your .22LR is solved with a dedicated rimfire drag law, sourced from JBM Ballistics — not a rifle G-function or a pellet curve pressed into service. One of nine real drag laws in the app, chosen to fit the projectile in front of you.
Log an observed drop at a known range and PelletArc fits the BC to your barrel and lot: one shot calibrates a scalar BC, two or three fit a velocity-dependent curve. The built-in DOPE log feeds the calibration in one tap.
Read the holdover in mil, MOA or cm, see it drawn on one of 15 angular-correct reticles, and export a holdover / turret card to PDF. It all runs fully offline — no account, no signal, no tracking.
A trajectory you can trust, a holdover you can read, and a calibration loop that closes against your own groups — for plinking, small-bore practice or a rimfire afternoon.
Any .22LR table you find online was measured on someone else's rifle, with someone else's lot. PelletArc treats published numbers as a starting point and hands you the tool to make them yours: shoot, log the drop, true the BC. The free tier solves at full accuracy to 35 metres; Pro adds unlimited range, saved profiles, the velocity-curve fit and the PDF card.
Read more in What is BC truing · mil vs MOA · airgun ballistics calculator.
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One-time purchase · free to 35 m · see pricing.
iOS & Android · one-time purchase · works fully offline.
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