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Balistix Ultra Hunt Bullets

Balistix RBT Ultra Hunt BC & Twist Rate

Calibre Bullet Weight Bullet Type G1 BC G7 BC Barrel Twist
Rate (Typical)
Stability Factor (SG)
Sea Level @20DegC
Stability Factor (SG)
Highveld (1400m)
@ 20DegC
.308" 155gr RBT Ultra Hunt 0.31 0.15 12 1.57 1.85
.308" 165gr RBT Ultra Hunt 0.34 0.17 11 1.77 2.07
.308" 175gr RBT Ultra Hunt 0.35 0.17 10 1.99 2.36
.323" / 8mm 200gr RBT Ultra Hunt 0.45 0.22 10 1.98 2.34
.338" 250gr RBT Ultra Hunt 0.42 0.21 10 1.91 2.26
.365" / 9.3mm 230gr RBT Ultra Hunt 0.31 0.15 14 1.94 2.3
.375" 250gr RBT Ultra Hunt 0.33 0,16 14 2.07 2.45

1. Bullet Manufacturing

  • Consistent geometry (CNC manufactured).
  • Mid SAAMI tolerance on diameter (± 3,5 Micron (µm) maximum on manufacturing).

2. Technical Features of Bullet

2.1 Material

  • Pure copper (>99,5% copper).
  • Environmentally friendly (lead free).
  • Aligned with international trends (embargo on leaded ammunition).
  • Specific gravity of pure copper is 10 – 15% less than equivalent lead core bullets. The monolithic bullet is lighter than the equivalent length lead core bullet, therefore increased velocity is achievable.
  • By selecting the appropriate monolithic bullet for a given twist rate, a flatter trajectory may be achievable compared to the lead core alternative. Follow manufacturer’s recommendation on selecting an appropriate bullet weight for the rifle’s twist rate.

2.2 Rebated Boat Tail

  • Deflected gas flow away from the bullet during bullet exit at crown, ensuring less turbulent gas conditions in front of the bullet.
  • Up to 15% increase in precision and accuracy compared to conventional boat tail design.
  • Flat base bullet precision and accuracy with boat tail BC benefits.
  • Boat tail angle conforms to the popular industrial standard for optimised BC.

2.3 Ogive

  • Tangent Ogive design which is less “jump” sensitive.
  • Ogive is not off a “bore rider” design, i.e. the ogive engages with the lands.
  • Bullet is “tunable” for precision (i.e. jump adjustable).
  • Bullet position in case can be measured with ogive comparator tools.
  • Both a “target” and “hunting” ogive designs available. Same impact point.

2.4 Bearing Surface

  • Designed within SAAMI tolerances.
  • Improved low friction drive band design which results in:
    – Minimum copper fouling
    – Low pressure characteristics

3. Hexagonal Boron Nitrate (HBN)

Hexagonal Boron Nitrate is widely used in industrial applications due to its excellent dry lubricating properties and ultra-high-temperature abilities. Hexagonal Boron Nitrate has the best combination of high temperature resistance and lubricating properties, out of all solid lubricants available today.

3.1 Excellent Lubrication

  • HBN application results in less fouling and less pressure compared to untreated monolithic bullets.
  • Reduced extreme velocity spread and therefore improved precision and accuracy.
  • Improved accuracy between cold bore and follow-up shots. Further reduces elevation dispersion.