Quick Answer
A 100gr .243 bullet can maintain integrity to a certain extent after impact, but it largely depends on the velocity, kinetic energy, and type of bullet used. Generally, a well-designed 100gr .243 bullet can expand and retain weight with minimal fragmentation, but excessive penetration or high-angle impacts may compromise its integrity.
Bullet Design and Construction
A well-designed 100gr .243 bullet, such as the Hornady V-MAX or the Sierra GameKing, is typically made from a hard, copper alloy with a soft, lead core. The copper jacket helps to maintain the bullet’s integrity by preventing excessive lead deformation and providing a consistent expansion profile. These bullets are also designed to mushroom and expand at a controlled rate, retaining a significant portion of their weight for deep penetration.
Terminal Ballistics and Expansion
When a 100gr .243 bullet impacts a deer at a moderate velocity (around 2,600-2,800 ft/s), it can generate a significant amount of kinetic energy (around 1,300-1,500 ft-lbs). This energy is distributed across the bullet’s surface, causing it to expand and create a larger wound channel. If the bullet is designed to expand consistently, it can create a wound channel of around 6-8 inches in diameter, depending on the animal’s size and the angle of impact.
Factors Affecting Integrity
However, several factors can compromise the integrity of a 100gr .243 bullet after impact, including high-angle impacts, excessive penetration, and high-velocity collisions. At higher velocities (above 3,000 ft/s), the bullet’s expansion can become unpredictable, leading to excessive fragmentation and a decreased retention of weight. Additionally, high-angle impacts can cause the bullet to tumble or yaw, compromising its integrity and potentially leading to a smaller wound channel.
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