Sierra VarmintKing (formerly Varminter) bullets are a specialized line of reloading components from Sierra Bullets, specifically engineered for high-accuracy, rapid-expansion performance on small game and varmints. They are designed to deliver explosive terminal performance (total frangibility upon impact) and extreme accuracy, often capable of producing 1/4 minute of angle (MOA) groups.

Key Features and Performance

• Rapid Expansion: These bullets feature thin, precisely drawn jackets and soft cores designed to produce immediate, devastating expansion, even at long ranges.
• High Accuracy: Known for “pinpoint accuracy,” they are suitable for intense varminting where small targets require high precision.
• Bullet Profiles: The line includes several shapes, primarily:
  • Spitzer (SBT): Pointed shapes for reduced drag and better ballistic coefficients.
  • Hollow Point (HP): Designed for maximum expansion.
  • Semi-Point (SMP): Shorter, designed for easier stabilization in older, slower-twist barrels.
  • Blitz: Specifically designed for very high velocities (over 3600 fps) with maximum frangibility.
• Optimal Use: Primarily intended for short-to-medium range, but effective at longer ranges depending on the cartridge.

Common Applications

Specifically intended for small game, predators  and varmints (e.g. Jackal).

Performance Notes

• Velocity Constraints: While designed for high velocity, some bullets (like the Blitz line) are best kept under 3600 fps to avoid excessive disintegration in flight.
• Twist Rates: Many 55gr and lighter Varminter bullets are designed for “conventional” 1×12″ or 1×14″ twist rates, and may disintegrate if used in very fast twist barrels.
• Handgun Usage: They are highly effective in .22 caliber centerfire handguns, providing needed expansion at lower,, but still high, handgun velocities.

These bullets are designed for handloaders seeking to maximize the performance of rifles in calibers like .22-250, .220 Swift, .222 Remington, .223 Remington, and various 6mm cartridges.

More details available here: https://sierrabullets.com/6mm-80-gr-sbt-varmintking-vk/