Berger .308 Caliber 185 grain LRBT (Juggernaut)

Dimensions taken from Lot#1520

Sample Size:

10

Ogive Radius:

9.13  calibers

Sectional Density:

0.279 lb/in2

Rt/R:

0.95

  Affectionately known as the Juggernaut to many .308 Palma shooters for its incredible wind bucking, this bullet has become a favorite heavy option for managing the wind at long range. The long tangent ogive makes this bullet insensitive to seating depth, which means that accurate loads are easy to find in a variety of chambers.  When loaded to max pressures in a .308 Winchester bolt rifle with a 30" barrel, muzzle velocities approaching 2800 fps are not uncommon.  At that speed, the ballistic performance of this bullet is decisively better than the lighter 155 grain class bullets that are required by the rules of international FULLBORE and Palma shooting.

  This bullet is also gaining favor in tactical shooting applications as an alternative to the popular 175 grain benchmark.  Although the 185 won't achieve as high of a muzzle velocity, it retains velocity better because of its higher BC, and will often outperform most lighter bullets in long range applications where wind deflection is a major consideration.

  Berger recommends a 1:12" twist or faster for this bullet, but it can be stabilized from a 1:13" twist barrel in most conditions if velocity is adequate.

  Downsides to this bullet compared to the lighter 155 and 175 grain bullets are recoil, and more drop.  It's up to the shooter to decide if the added recoil is worth the enhanced resistance to wind deflection.  The extra drop is a non issue for known distance shooting applications.

   This bullet is available loaded in the .300 Winchester Magnum cartridge from Applied Ballistics Munitions.

Drag and Ballistic Coefficient

Fps/Mach

Cd

i7

G7 BC

i1

G1 BC

1500/1.34

0.362

0.986

0.283

0.548

0.509

2000/1.79

0.312

0.997

0.279

0.502

0.555

2500/2.23

0.279

0.981

0.284

0.493

0.565

3000/2.68

0.254

0.977

0.285

0.479

0.582

Average:

0.985

0.283

0.505

0.553

Variation:

0.020

0.006

0.069

0.073

Rifling Twist Rate and Stability

Stability Factor

Barrel Twist

Best case

Nominal

Worst Case

1:10"

2.31

2.02

1.75

1:11"

1.91

1.67

1.44

1:12"

1.61

1.40

1.21

1:13"

1.37

1.20

1.03

*Stability Factor above 1.4 indicates good stability.  Below 1.4 indicates marginal stability.  Less than 1.0 is unstable.