To throw a projectile you can either throw t it, or quiver Q a stack of it and then fire f from that stack. There is no bonus or penalty for using the fire command; it is merely a convenience. (Gold is an exception.)
Any item can be thrown (and thus be considered a projectile) if the entity throwing it is strong enough. Use the throw command to provide a list of readily-thrown items. You can expand this list to include your entire inventory by pressing *.
Some objects however are designed to be thrown:
The artifact weapon Mjollnir requires a strength of 25 to throw. If thrown by a Valkyrie, it will usually return to her hand. If that fails or if you are blind, fumbling, confused, stunned, or hallucinating Mjollnir falls at your feet or you get hit.
These objects are unaffected by the use of a launcher.
Launchers and their ammunitions
Other objects, called ammunition projectiles, or shot projectiles, are designed to be used with a launcher.
|Launchers and their ammunitions|
To get the most out of the ammunition projectiles, you need to wield w the corresponding launcher before attempt to shoot the projectiles. Then you may throw t or quiver Q and fire f them just as you would the thrown projectiles.
These shot projectiles can also be thrown in the absence of a launcher, but they will be less effective.
Some projectiles may break (or mulch) when they score a hit. Misses and projectiles that do not cross paths with any monsters never break.
Glass objects, including potions, may also break when thrown regardless of whether they hit anything, but this is handled by a different code path which prints "An <object> shatters into a thousand pieces!". Other projectile breakage of non-fragile objects is silent and prints nothing.
The projectiles subject to breaking are:
- arrows, orcish arrows, elven arrows, silver arrows, and ya
- crossbow bolts
- all gems, rocks, and flint stones
Blessing these projectiles lowers the chance of them breaking by an amount that depends on your Luck. Enchanting them also reduces this chance. Stones and gems cannot be enchanted, but if they are blessed they will benefit from the reduced chance of breaking due to Luck.
The chance of breakage can be calculated as follows:
chance = 3 + erosion - enchantment, where
erosionis 3 if thoroughly eroded, 2 if very eroded, 1 if just eroded, and 0 otherwise. If the projectile has both types of erosion for its material, use the greater erosion only; erosions do not stack.
chanceis at least 2, the projectile has a
(chance-1)/chancechance of breakage. Otherwise, it has a 1/4 chance.
- If the projectile is blessed, it further decreases the chance of breaking, dependent on the character's luck. Specifically, if
rnl(4)evaluates to 0, the projectile will not break.  Multiply the value from step 2 by the value from the table below. The result is the total chance of the projectile breaking.
|Luck Range||Approximate chance of breakage (rnl(4) > 0)|
|-13 to -1||99.3%|
|0 to 1||75%|
|2 to 4||50.5%|
|5 to 7||26.2%|
|8 to 13||1.8%|
You will get slightly less than uses out of each projectile hit, where is the probability of a projectile breaking on a given hit. The median total number of uses you will get is approximately that number multiplied by the starting number of arrows; for instance if you have 50 arrows, each with a one in four chance of breakage per shot, you will get around 200 hits out of them. However, the distribution is fairly wide, so results may vary significantly.
Launchers and missiles in melee
If a launcher (bow, sling, or crossbow), a launcher's ammo (arrow, bolt, etc.), or a missile (boomerang, shuriken, dart) is used in melee, only 1d2 damage is usually done (regardless of enchantment), and the skill will not be trained.
All forms of arrows, as well as darts, crossbow bolts, shuriken, boomerangs, and rocks may be wished for up to 20 at a time. Gems and gray stones cannot be wished for in this way. (Note that this is generally not an effective use of wishes.)
In fact, anything can be used as a projectile. Cockatrice eggs make popular missiles, and so do various potions. (Bashing monsters with a wielded one is more likely to score a hit, and will not petrify you.)
- Exception: When you are levitating, you cannot throw arrows or crossbow bolts past boulders unless you are wielding the appropriate launcher.
To exercise your skill with a projectile weapon designed to be thrown or shot from a launcher, you must throw t or fire f it and successfully hit an enemy, dealing at least 1 damage. Spears, javelins, and daggers are the exception, those skills are also exercised by wielding the weapon and striking foes in melee.
A user has suggested improving this page or section as follows:
"Something should be added, at least about skills. Exactly how does enhancing skill effect missile use? Does the damage you deal when wielding an arrow increase with higher bow skill? Perhaps the strategy section could feature more inter-missile comparisons?"