Guide for the PandaMods howitzer
How to Use the M777 Howitzer in Arma Reforger
The M777 from PandaMods is aimed with numbers, not by eye: a charge, an azimuth and an elevation in mils. This guide goes through one fire mission from placing the gun to the round on target, with real numbers from the tables. If you already know the drill, the M777 calculator page gets you straight to the numbers.
Open the calculator with the M777
1. Place the gun at a usable range
The M777 has five charges and two arcs, and each pair covers its own band of ranges. The low arc reaches from 200 metres on charge 1. The high arc, where the round comes down steeply over hills and buildings, starts much further out and moves out with every charge.
- Charge 1
- low 200–4000 m, high 2800–4400 m, dispersion 21 m
- Charge 2
- low 600–7000 m, high 4400–7000 m, dispersion 53 and 45 m
- Charge 3
- low 1000–11 600 m, high 6800–11 400 m, dispersion 83 and 50 m
- Charge 4
- low 1600–15 000 m, high 8800–15 000 m, dispersion 69 and 55 m
- Charge 5
- low 2000–18 000 m, high 10 600–18 000 m, dispersion 69 and 73 m
In practice: if you want plunging fire, keep the gun at least 2.8 kilometres from where you expect to shoot. Charge 1 is also the tightest, 21 metres, so a position three to four kilometres out is a comfortable place to start.
2. Put the gun and the target on the map
In the calculator, choose the map workflow, pick the map, and place two points: where the gun stands and where the target is. The heights of both come from the map terrain, and the height difference is shown next to the solution. If the target came over voice as a grid, the coordinate workflow takes it as numbers instead.
3. Choose the charge and the arc
Most ranges can be reached several ways, and the calculator lists all of them with the recommended one first. Here is one real target on Everon: 3708 metres away and 267 metres higher than the gun.
- Charge 1, high
- elevation 1122 mil, 41.3 s, falls at 68°, dispersion 21 m
- Charge 2, low
- elevation 310 mil, 13.5 s, falls at 14°, dispersion 53 m
- Charge 3, low
- elevation 180 mil, 9.3 s, falls at 8°, dispersion 83 m
- Charge 4, low
- elevation 122 mil, 7.3 s, falls at 6°, dispersion 69 m
The high arc flies three to six times longer but drops almost straight down and scatters least, which suits a target behind a ridge or among buildings. The low arcs arrive in seconds but skim in flat and spread wider. The height matters differently too: the same 267-metre climb moves the elevation by −19 mils on the high arc and by +83 on charge 2 low. That is why the heights are read from the terrain rather than ignored.
4. Lay the gun and fire
Set the charge, then lay the gun on the azimuth and the elevation the calculator gives, all in mils on the 6400 scale. Note the time of flight: it tells the observer when to watch for the impact. The wind correction for the M777 is switched off in the calculator on purpose, because its in-game check is not finished, and the solution says so.
5. Read the impact and correct
After the shot, press "Record shot". Enter what the observer reports, left or right and add or drop in metres, or mark where the round landed on the map, and the calculator returns new settings. Confirm the correction, then choose "Next adjusting shot" to keep walking the rounds in, or "Fire for effect" once they are on target. Several guns on one target are covered by the battery mode.
Where the numbers come from
The M777 tables were measured by the project in controlled in-game firing on mod version 2.1.2, read twice, and are used with the mod author's permission. The full breakdown is on the M777 calculator page and the sources page.