Literally since its introduction riflemen and hunters have been looking to improve the terminal and exterior ballistics
of the AR-15.
For decades, hunters and shooters have been looking to improve the terminal and exterior ballistics
of the AR15 with cartridges like the 6x45,6.5mm Grendel and others.
For instance, exterior ballistics
solvers were only wishful thinking not that long ago.
Streamlining a bullet tip affects exterior ballistics
less than the polymer's "wedge" function affects terminal ballistics.
And yet, as illustrated in the exterior ballistics
comparison chart on page 30, when both cartridges are loaded to maximum velocities with the same bullet, there is not a great deal of difference in wind drift.
. The ballistic model is principally based on Newton's law and the equations of motion are considered to be under the effect of air drag and the force of gravity only.
Along with the hand-load chart, I put together a comparison of the exterior ballistics
of the 200-grain Nosier Partition and 210-grain Berger Hunting VLD out to 600 yards.
, while inferior to the 7.62x54mmR, was geared towards actual infantry ranges.
Topics will cover interior ballistics, exterior ballistics
, launch dynamics, explosion mechanics, vulnerability, and terminal ballistics.
In response, I have prepared an abridged primer on basic exterior ballistics
. Being an introduction to ballistics, we will only scratch the surface of this topic, but hopefully create an itch to further its study.
The text is divided into three parts on interior ballistics, exterior ballistics
, and terminal ballistics (the phase that begins when a projectile reaches a target).
Remember, too, that bullet shape affects exterior ballistics
. A more pointed and streamlined bullet (one with a high ballistic coefficient) shoots with a flatter trajectory, reduced wind deflection, higher retained velocity and increased downrange energy.