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.300 Rem. Ultra Mag

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Caliber .300 Rem. Ultra Mag load data and technical Specifications

Caliber Specifications:

Caliber:
.300 Rem. Ultra Mag
Standard / Datasheet:
C.I.P.
Bullet Diameter:
0.308" | 7.82mm
Primer Size:
Large Rifle Magnum (LRM)
Max. Case Length:
2.850" | 72.39mm
Max. Cartridge Length / OAL:
3.598" | 91.39mm
Max. Standardized Pressure:
64977 psi | 4480 bar
Case Capacity:
112.5 Grains of Water
CID:
CID_374
  • The .300 Rem. Ultra Magnum is an incredibly powerful shell, developed in 2005 for use by serious hunters and target shooters alike. This round combines the velocity and energy of a magnum rifle cartridge with superior accuracy potential - making it perfect for taking down larger game animals out to extended distances as well as precision shooting competitions.Offering unrivaled accuracy potential from quality rifles equipped with optics, this rifle round is capable of efficiently killing even the largest game animals out to ranges that most other magnums are unable to reach - while retaining sufficient power to penetrate through thick hides and bone. Its dependable performance across temperatures and atmospheric conditions makes it ideal for shooters looking for consistent precision at extreme distances.

  • Velocity (V0)

    .308 | 65gr | Impala LWFP KS

    [3862 fps | 1177 m/s]

    .300 Rem. Ultra Mag + Impala Bullets
    .308 | 110gr | Nosler Varmageddon

    [3356 fps | 1023 m/s]

    .300 Rem. Ultra Mag + Nosler
    .308 | 110gr | Hornady GMX L1.15

    [3353 fps | 1022 m/s]

    .300 Rem. Ultra Mag + Hornady

    Energy  (E0)

    Ballistic Coefficient (BC1)

  • Bullet Weight (gr) ->
    0-50
    50-75
    75-100
    100-150
    150-200
    200-300
    >300

    The following table indicates  for this caliber and various bullet weight ranges (in grains) which powders are suitable (👍) and popular among our reloading community (👍👍).  This might evolve over time as more community members share their loads and as we accumulate more calculations and tests with our balistics calculator.

  • Weight vs. Velocity - Suitable Bullets for this Caliber

    You need to get an access license to view this chart. See an example with the following caliber: .22 Nosler

    Barrel Length  Variation vs. Velocity - by Bullet Weight

  • Number of loads in this caliber shared by community members:

    4

.300 Rem. Ultra Mag load data available with the following bullets:

(most popular first)

Filter by Bullet Weight (Grains)
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