22.3 C
Paris
Friday, July 28, 2017

7mm-08 Remington

Technical Specifications

 

Country of Origin United States
Diameter – Bore .277” (7,04 mm)
Diameter – Groove .2837” (7,206 mm)
Introduced 1980
Pressure – Max Average 61,000 psi (421 Mpa)
Regulators SAAMI & CIP
Groove Details 6 x 0.110” (2,79 mm)
Shellholder – RCBS 3
Twist – Proof Barrel 1:9.5” (1:241,3 mm)
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt
Cartridge Essentials

 

Action Size Recommended Miniature length & .223 bolt face
Barrel Life 3,000 – 3,800 rounds
Case – Body Taper .72°
Case – Neck Length .2842” (7,22mm) = 100%
Case – Trim Length 2.027” (51,49mm)
Parent Case .308 Winchester
Relative Capacity 55.0 gr of water (3,57 cc)
Shoulder Angle 20°
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt
Typical Factory Load Guidelines for Africa
Brand Name Bullet Weight Bullet Description Velocity Fps Energy Ft/Lb Trauma Potential 100% Expansion
This cartridge lacks 160-gr and 175-gr factory loads for Africa
Federal 150-gr Power Shok Hot Cor 2,650 fps 2,340 ft/lb 33.4
Nosler 140-gr Trophy Gr Accubond 2,825 fps 2,482 ft/lb 34.4
Remington 140-gr V Shok Trophy Copper 2,800 fps 2,438 ft/lb 33.8
Remington 140-gr V Shok Nosler Part 2,800 fps 2,438 ft/lb 33.8
Winchester 140-gr Power Max Bonded 2,800 fps 2,438 ft/lb 33.8
Hornady 139-gr Superformance SST 2,950 fps 2,687 ft/lb 37.2
Hornady 139-gr Superformance GMX 2,910 fps 2,614 ft/lb 36.2
Barnes 120-gr Vor-tx TTSX 3,005 fps 2,407 ft/lb 33.4
Hornady 120-gr CustomLite SST 2,675 fps 1,907 ft/lb 26.4
Optimum Game Bullet Optimum Application Bands (140-gr averaged)
Band Velocity Parameters Start End
Red-Band ( > 2,600 fps) 0 yds ± 100 yds
Green-Band ( ≤ 2,600 fps – ≥ 2,200 fps) ± 100 yds ± 300 yds
Amber-Band ( ≤ 2,200 fps – ≥ 2,000 fps ± 300 yds ± 400 yds
Bullet Recommendations for Africa
Plains Game Premium fourth generation to seventh generation bullets
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt
African Game Weight Recommendation
≤ 550-lb ( ≤ 250-kg)
Most Suitable African Species (assuming legality)
Plains Game Addax, black wildebeest, gemsbok, hartebeest, lechwe, nyala, sable, scimitar horned oryx, sitatunga and tsessebe
* Read all about these animals in the book Game Animals of the World by Chris & Tilde Stuart
Optics Guidelines
Eye Relief Non critical
Exit Pupil ≤ 3mm
Magnification: Red-Band ≥ 3x
Magnification: Green-Band ≥ 8x – ≤ 10x
Magnification: Amber-Band ≥ 14x – ≤ 16x
Objective Lens ≥ 40mm – ≤ 50mm
Parallax Adjustability No
Reticules Duplex
Handloading Guidelines
Load Development 0.5 grain increments
Primer Standard Large Rifle
Propellant Range ≥ 160-gr: Slow-burning rifle: ≥ Hogdon H-414 – Hodgdon H-4831
60-gr: Medium-bunring rifle: ≥ IMR-4007 – Hogdon H-380
Tips None
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt