Your dope, trued to your rifle.
Free trajectory, card, recoil, energy, and stability calculators on the published G1/G7 standard drag models, drop charts for factory loads, and a bullet library where every BC names its source. When you are ready, the Kit keeps your rifles, your loads, your ladder tests, and your chronograph strings in your browser — and trues the card to your real impacts.
Every tool runs in this browser and prints a clean card. Bullet data comes from the manufacturers' own published BCs — 179 bullets, each labeled with its source.
Full point-mass trajectory on the standard G1 and G7 drag models — drop, drift, velocity, energy, time of flight, in inches, MOA, or mil.
Open the tool →Come-ups with turret clicks plus a 10 mph wind column, formatted to print and tape to your stock.
Open the tool →The JBM-style matrix: come-ups across five temperatures and five altitudes on one printable card.
Open the tool →A pocket-size card in 50-yard steps — wind-only and constant-drop variants included.
Open the tool →The advanced solver: bullet dimensions, spin drift, Coriolis, and a stability estimate.
Open the tool →Free recoil energy and rifle velocity from the momentum balance — the closed-form SAAMI method.
Open the tool →Energy at the muzzle and downrange, from the same solver that builds the drop charts.
Open the tool →USPSA-style power factor with minor/major thresholds, at the muzzle and downrange.
Open the tool →Sectional density, form factor, BC from two chronograph velocities, and drag-model conversion by trajectory matching.
Open the tool →Miller twist-rule gyroscopic stability with velocity and atmosphere corrections.
Open the tool →How far the bullet actually travels — apex, time of flight, and impact velocity.
Open the tool →Mean, SD, and extreme spread — with the honest 95% range on your SD, not just the number.
Open the tool →Solver-generated charts for factory ammunition — published muzzle velocity and published BC in, predicted trajectory out. Your rifle will differ; the chart pages say so, and the truing guide shows how to close the gap.
Calculators are free everywhere. What nobody gives you on the web is the record: what you actually loaded, what the chronograph actually said, and a card corrected to your actual impacts. That record is the Kit.
$39 one-time — no subscription, ever
Included in the $39 TruingLog Kit — everything above, one payment.
Get the TruingLog Kit — $39 one-time