.404 Jeffery

Technical Specifications

 

Country of Origin United States
Diameter – Bore .412” (10,46mm)
Diameter – Groove .424” (10,77mm)
Introduced 1905
Pressure – Max Average 52,938 psi (365 MPa)
Regulators CIP
Groove Details 6 x 0.138” (3,50mm)
Shellholder – RCBS 26
Twist – Proof Barrel 1:16.54” (420mm)
* Read all about this cartridge in the book African Dangerous Game Cartridges by Pierre van der Walt
Cartridge Essentials

 

Action Size Recommended Miniature length & .223 bolt face
Barrel Life 6,000 – 7,500 rounds
Case – Body Taper .67°
Case – Neck Length .624” (15.85) = 147.5%
Case – Trim Length 2.867” (72,82mm)
Parent Case Original
Relative Capacity 113.3 gr water (7,356 cc)
Shoulder Angle 8°30’31”
Typical Factory Load Guidelines for
Brand Name Bullet Weight Bullet Description Velocity Fps Energy Ft/Lb Trauma Potential 100% Expansion
Norma 450-gr African PH-Woodleigh 2,150 fps 4,620 ft/lb 43.0 expand less penetration
Hornady 400-gr DGS 2,300 fps 4, ft/lb 87.5 no expansion
Hornady 400-gr DGX 2,300 fps 4,700 ft/lb 43.7 expand less penetration
Norma 400-gr Norma Solid 2,325 fps 4,802 ft/lb 89.4 no expansion
Optimum Bullet Optimum Application Bands (400-gr averaged)
Band Velocity Parameters Start End
Green-Band ( ≤ 2,600 fps – ≥ 2,200 fps) ± 0 yds ± 40 yds
Amber-Band ( ≤ 2,200 fps – ≥ 2,000 fps) ± 40 yds ± 120 yds
Bullet Recommendations for Africa
Plains Game Premium generation and fifth generation bullets
Dangerous Flat-nosed monometal solids
* Read all about this cartridge in the book African Dangerous Game Cartridges by Pierre van der Walt
African Game Weight Recommendation
≤ 13,000 lb ( ≤ 6000 kg)
Most Suitable African Species (assuming legality)
Plains Game Eland, Giraffe
Thick-skinned Hippo
Dangerous , Elephant, Rhino
* Read all about these animals in the book Game Animals of the World by Chris & Tilde Stuart
Optics Guidelines
Eye Relief Critical ≥ 3.75” ( ≥ 95mm)
Exit Pupil ≥ 5mm
Magnification: Red-Band n/a
Magnification: Green-Band = 1x
Magnification: Amber-Band ≤4x
Objective Lens ≥ 25mm – ≤ 30mm
Parallax Adjustability No
Reticules Bold posts. German #1, #2, #4, #9, #56
Consider illuminated dots
Handloading Guidelines
Load Development 1.0 grain increments
Primer Large Magnum
Propellant Range Slower medium-burning rifle: ≥ Hodgdon H-4895 – ≤ Hodgdon H-414
Tips Factory ballistics can be improved with handloads
Full length resize
Check feeding reliability before
* Read all about this cartridge in the book African Dangerous Game Cartridges by Pierre van der Walt