.308 Winchester / 7,62 x 51mm NATO

Technical Specifications

 

Country of Origin United States
Diameter – Bore .300″ (7,62mm)
Diameter – Groove .308″ (7,82mm)
Introduced 1952
Pressure – Max Average 62,000 psi (415 MPa)
Regulators SAAMI & CIP
Groove Details 4 x .1760″ (.447mm)
Shellholder – RCBS 3
Twist – Proof Barrel 1:12″ (1:305mm)
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt
Cartridge Essentials

 

Action Size Recommended Short length & standard bolt face
Barrel Life 5,100 – 5,800 rounds
Case – Body Taper .52°
Case – Neck Length .3034″ (7,706mm) = 98.5.1%
Case – Trim Length 2.007″ (50.98 mm)
Parent Case .30-06 Springfield
Relative Capacity 56.0 gr water (3,636 cc)
Shoulder Angle 20°00’00”
Typical Factory Load Guidelines for Africa – Expanders
Brand Name Bullet Weight Bullet Description Velocity Fps Energy Ft/Lb Trauma Potential 100% Expansion
Federal 180-gr Trophy Bonded 2,620 fps 2,744 ft/lb 35.1
Norma 180-gr Norma Oryx 2,610 fps 2,723 ft/lb 34.8
Norma 180-gr Norma Plastic Point 2,612 fps 2,728 ft/lb 34.9
PMP 180-gr ProAm 2,543 fps 2,585 ft/lb 33
Remington 180-gr Ultra Bond Core-Lok 2,620 fps 2,744 ft/lb 35.1
Barnes 168-gr Barnes TTSX BT 2,680 fps 2,680 ft/lb 34.3
PMP 168-gr PMP Soft Point 2,559 fps 2,443 ft/lb 31.2
Winchester 168-gr Ballistic Silvertip 2,670 fps 2,660 ft/lb 34
Federal 165-gr Trophy Bonded 2,880 fps 3,040 ft/lb 38.9
Hornady 165-gr Hornady Interbond 2,840 fps 2,956 ft/lb 37.8
Norma 165-gr Norma Oryx 2,740 fps 2,751 ft/lb 35.2
Norma 165-gr Swift A-Frame 2,700 fps 2,672 ft/lb 34.1
Remington 165-gr Remington Accutip 2,700 fps 2,672 ft/lb 34.1
Barnes 150-gr Barnes TTSX BT 2,820 fps 2,649 ft/lb 33.9
Federal 150-gr Nosler Partition 2,840 fps 2,687 ft/lb 34.3
Hornady 150-gr Hornady Interbond 3,000 fps 2,998 ft/lb 38.3
Norma 150-gr Norma Kalahari 2,920 fps 2,841 ft/lb 36.3
Norma 150-gr Nosler Ballistic Tip 2,822 fps 2,653 ft/lb 33.9
PMP 150-gr ProAm 2,756 fps 2,530 ft/lb 32.3
Remington 150-gr Ultra Bond Core-Lok 2,820 fps 2,649 ft/lb 33.9
Winchester 150-gr Winchester XP3 2,825 fps 2,659 ft/lb 34

 

Optimum Game Bullet Optimum Application Bands (180-gr averaged)
Band Velocity Parameters Start End
Red-Band ( > 2,600 fps) 0 yds ± 50 yds
Green-Band ( ≤ 2,600 fps – ≥ 2,200 fps) ± 50 yds ± 275 yds
Amber-Band ( ≤ 2,200 fps – ≥ 2,000 fps ) ± 275 yds ± 400 yds
Bullet Recommendations for Africa
Red-Band Fifth generation bonded core or seventh generation monometal
Green-Band Fifth and sixth generation bullets
Amber-Band Fourth generation premium bullets
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt
African Game Weight Recommendation
≤ 750-lb (≤ 350-kg)
Most Suitable African Species (assuming legality)
Antelope : Blue wildebeest, gemsbok, kudu, leopard, okapi, roan, sable, waterbuck, zebra. Technically it is good enough for lion, but magnum velocity transition bore cartridges are recommended for that species. Many southern eland has been taken with it, but there are better cartridges for that species as well.
* 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 ≤ 4mm
Magnification: Red-Band ≥ 1x – ≤ 2x
Magnification: Green-Band ≥ 3x – ≤ 9x
Magnification: Amber-Band ≥ 12x – ≤ 14x
Objective Lens ≥ 40mm – ≤ 44mm
Parallax Adjustability Only for Amber-Band hunting
Reticules Duplex
Handloading Guidelines
Load Development 1.0 grain increments
Primer Standard Large Rifle
Propellant Range ≥ 180-gr: Medium-burning ≥ IMR-4895 – ≤ IMR-4007
≤ 165-gr: Medium-burning ≥ IMR-8208 – ≤ IMR-4320
≤ 150-gr: Medium-burning ≥ IMR-3031 – ≤ IMR-4064
Tips None
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt