.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 by Pierre 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 , gemsbok, kudu, leopard, okapi, roan, sable, waterbuck, . Technically it is good enough for , 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
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
None
* Read all about this cartridge in the book African Medium Bore Cartridges by Pierre van der Walt