Zeryn Precision vs Handload

Dope you can trust — whether you shoot a $400 rimfire with iron sights or a custom rig at 1,000 yards. Zeryn Precision is a data app built by shooters, for shooters. It replaces the notebook, the shoebox of range cards, and the guesswork with one place that tracks your rifles, your loads, your groups, and your barrel — and teaches you every concept along the way. Precision doesn't have to cost a fortune. YOUR RIFLES, SET UP PROPERLY Add your rifle and optic once — about five minutes. Scopes or open sights: blade, aperture, globe, ghost ring. Zeryn takes iron sights seriously, so your lever gun gets the same treatment as a match rifle. DOPE YOU CAN DIAL Zeryn builds a full dope table for your rifle and load — drop, wind, spin drift — in MOA or mils, out past 1,000. Then True Your Dope: tell it where your shots actually landed and it corrects the table to match your rifle in the real world. Book numbers get you close. Trued dope gets you hits. QUICK DOPE No profile yet? Pick a caliber and a factory load and get a working table in seconds — honest about its limits, with a clear path to a trued profile when you're ready. FIND WHAT YOUR RIFLE LIKES Run a factory ammo shootout: pick contenders from a library of 1,500+ factory loads, shoot a group per ammo on any target you like, and log the numbers. Zeryn picks the winner and graduates it into a Load — dope table and all. Stop buying bulk before you know it shoots. BUILD YOUR HANDLOAD Full load development workups — charge ladders and seating-depth steps. Shoot your steps on any target, log your groups and ES/SD, and graduate the winning node into a Load. Custom projectiles are welcome, with a BC estimator for when the box doesn't tell you. WATCH YOURSELF GET BETTER Log groups, browse your group history, and track your barrel over time — round counts and throat erosion — so you see accuracy trends and plan the rebarrel before it costs you. WE TEACH AS WE GO This is the part other apps skip. Every info button in Zeryn explains the concept in plain words — barrel length, sight height, twist rate, focal planes, turret travel — like a mate at the bench, not a physics lecture. A reference library covers BC, throat erosion, jump to the lands, reading wind, and estimating velocity without a chronograph. If you've ever bounced off a ballistics app because it assumed you already knew everything, this one was built for you. WHO IT'S FOR New shooters welcome. Iron sights welcome. The .22 you plink with on weekends counts just as much as a match rig. Rimfire to ELR, hunting rifles to long-range rigs — if you put rounds on paper and want them closer together, Zeryn is for you. Zeryn Precision is free. No account required. Your data stays yours.

Handload is a free reloading log and load development tool for handloaders who want to find their rifle's most accurate load — and keep every record safe. Brand-neutral by design. Log any powder, any bullet, any primer, any brass, from any manufacturer. RELOADING LOG Record every load recipe: cartridge, firearm, powder and charge weight, bullet, primer, brass, and seating depth (COAL/CBTO). Every load is tied to the rifle you shot it in, so your history stays organized. LOAD DEVELOPMENT Run charge weight ladders, OCW tests, and seating depth tuning. Enter your chronograph string and Handload calculates average velocity, extreme spread, and standard deviation automatically. The velocity chart highlights the flat spot — the accuracy node — so you can see exactly where your load stabilizes. GROUP AND ACCURACY TRACKING Log group size in MOA or millimetres, track accuracy across charge weights, and compare loads side by side to see which one your rifle actually prefers. COMPONENT INVENTORY Track powder, primers, bullets, and brass by quantity, lot number, and cost. Low stock alerts warn you before you run out mid-project. COST PER ROUND See what each round costs to load, broken down by component, with a break-even comparison against factory ammunition. BRASS AND BARREL LIFE Track case firings, trim length, primer pocket condition, and annealing. Keep a round count per barrel so you always know where you stand on throat erosion. YOUR DATA STAYS SAFE Cloud backup and sync, plus CSV and PDF export. No more losing years of load records to a dead phone. METRIC AND IMPERIAL Full support for grains and grams, fps and m/s, inches, MOA and mrad. FREE No ads. Core features free. SAFETY Handload is a record keeping and analysis tool. It does not supply load data and does not tell you what is safe to load. Always follow current published data from your powder, bullet and primer manufacturer, start low, and work up carefully. You are responsible for the safety of every round you load.