GunSpec

Ammunition

Resource class for interacting with the GunSpec Ammunition API. Wraps all /v1/ammunition endpoints. Instantiated internally by the GunSpec client and exposed as client.ammunition.

Auth RequiredBuilder+

Get ballistic trajectory data for an ammunition load.

ballistics(id: string, params?: AmmunitionBallisticsParams): Promise<APIResponse<BallisticProfile>>
GET/v1/ammunition/{id}/ballistics

  • stringheaderrequired

    Your API key. Authorization: Bearer <key> is accepted in its place.

  • stringrequired

    Ammunition load slug

    Accepts
    a lowercase slug: letters, digits and hyphens
    Example

  • number

    Barrel length to adjust muzzle velocity for

    Range
    50 – 2000
    Example
  • string

    Comma-separated distances in metres

    Example

  • object

    The response payload.

  • object

    The load the figures are for.

  • string

    Slug of the load the table was computed for.

  • string

    Display name, as the maker writes it.

  • string

    Slug of the cartridge. Resolve against /v1/calibers/{id}.

  • number | null

    Barrel length in millimetres, measured from the breech face.

  • number

    Muzzle velocity in metres per second, for the default load.

  • number

    Muzzle energy in joules, for the default load.

  • number

    Effective range in metres against a point target.

  • TerminalBallistics

    Terminal performance indices computed at the muzzle.

  • number

    Taylor Knock-Out factor.

  • number

    Momentum in kilogram-metres per second.

  • number

    Bullet mass divided by the square of its diameter. Higher penetrates better, all else equal.

  • number

    Hatcher Relative Stopping Power.

  • number

    Energy per unit frontal area, in joules per square centimetre.

  • TrajectoryPoint[]

    The solution sampled at each requested distance.

  • number

    Distance from the muzzle in metres.

  • number

    Remaining velocity at this distance, in metres per second.

  • number

    Remaining energy at this distance, in joules.

  • number

    Bullet drop below the line of sight at this distance, in centimetres.

  • number

    Time of flight to this distance, in seconds.

  • number

    Velocity as a multiple of the speed of sound. Below ~1.2 the projectile is transonic and destabilises.

  • number

    Momentum in kilogram-metres per second.

  • number

    Taylor Knock-Out factor at this distance.

  • number

    Energy per unit frontal area, in joules per square centimetre.

  • 400VALIDATION_ERRORValidation error
  • 401UNAUTHORIZEDAPI key required
  • 403FORBIDDENValid key, not permitted
  • 404NOT_FOUNDResource not found
  • 429RATE_LIMITEDRate limit exceeded
  • 500INTERNAL_ERRORUnexpected server error

Minimum tier
Builder+
Monthly quota
25,000/mo
Rate limit
60/min
Daily cap
2,000

Figures shown are for this endpoint's minimum tier. Higher tiers raise every limit.