10.3 Capra Load Data & Reloading Guide
Also known as: 10.3mm Capra
About 10.3 Capra
The 10.3 Capra cartridge emerged as a response to the need for a versatile hunting round tailored to mountainous terrain and long-range shooting. Developed in the early 21st century, this caliber was designed to offer robust performance for European big game hunters, particularly those targeting species like ibex and chamois. Its inception was driven by the demand for a round that could maintain energy at extended distances while conforming to regional hunting regulations.
Technically, the 10.3 Capra features a bullet diameter of 10.3 millimeters, approximately .406 inches, and is typically housed in a rimless bottlenecked casing. It operates at higher pressures compared to traditional hunting cartridges, allowing it to achieve impressive velocity and energy. The cartridge often accommodates bullet weights ranging from 200 to 300 grains, providing a balance between range and stopping power which is essential for effective long-range shooting.
Ballistically, the 10.3 Capra demonstrates flat trajectories and excellent energy retention. Its design ensures stability in flight, making it a reliable choice for hitting targets at variable distances without sacrificing precision. The recoil is manageable, allowing for quick follow-up shots if necessary, which is advantageous in hunting scenarios where multiple engagements are common.
Reloaders favor the 10.3 Capra for its flexibility in bullet selection and powder loads, allowing customization to match specific hunting conditions and personal preferences. Its widespread popularity among European reloaders is due to the combination of precision and adaptability, making it a preferred choice for hunters focused on large game in diverse environments. The compatibility with modern loading equipment also ensures that reloaders can achieve consistent performance tailored to their unique shooting needs.
Technical Drawing

Technical Specifications
Start Calculating to Develop your own Load Data for 10.3 Capra
Use our professional ballistics calculator to develop safe and accurate load recipes for 10.3 Capra.
Start CalculatingStandard Load Data — 10.3 Capra
Select your desired cartridge and bullet weight below to access the corresponding load table. From there, you can choose any listed load recipe and transfer it directly into the ballistics calculator for further refinement, optimization, and precision tuning.
.416 | 300gr | Reichenberg Super Penetr.
.411 | 300gr | NorthFork Bonded Core
.416 | 350gr | Alaska Bullet Works Kodiak PP SPBC
.415 | 350gr | Rhino Solid Shank
.411 | 350gr | Swift A-Frame
.416 | 350gr | Speer Hot-Cor
.411 | 300gr | Hornady InterLock FP
.416 | 350gr | Swift A-Frame
.416 | 300gr | Reichenberg Solid
.416 | 400gr | A-Square DeadTough
.412 | 300gr | Alaska Bullet Works Kodiak PP SPBC
.411 | 300gr | Barnes TSX FB
.416 | 300gr | Reichenberg HDB Universal
.415 | 300gr | Rhino Penetrator
.413 | 235gr | Brenneke TOG
.416 | 305gr | AERO SORN,- smax:12.90
.410 | 260gr | Impala LW CFN
.413 | 231gr | Reichenberg Solid
.416 | 235gr | AERO SB,- smax:12.90
.413 | 200gr | Reichenberg HDB Sp. Jagd
.414 | 215gr | AERO SB,- smax:11.40
.416 | 215gr | AERO SB,- smax:11.10
.413 | 200gr | Impala LWHV LS
.413 | 200gr | Reichenberg HDB Universal
Frequently Asked Questions
The maximum pressure for 10.3 Capra is 59,466 psi | 4,100 bar.
10.3 Capra typically uses a Large Rifle Magnum (LRM) primer.
The case capacity of 10.3 Capra is approximately 101.5 grains of water (H₂O).