Otherwise, your ballistic block will behave differently and give misleading results when shot at.
The consistency of shape and texture, and therefore your ballistic studies, is dependant on carefully mixing at the same temperatures and cooling the gelatin correctly every time. One mixes or dissolves the gelatin in warm water, then it is molded to the right shape and cooled down. The essence of ballistic gel consists of so called 250A high bloom gelatin mixed with warm water that is then temperature treated. While airgun pellets have much lower velocities and energies than rimfire or centerfire projectiles, they can still be examined through the use of ballistic gel. Pictured: An airgun pellet shot in ballistic gelatin. As allways, a test is just a test and there is not a 1-to-1 relationship between testing and real world performance, but the characteristics of a bullets terminal performance, such as penetration, fragmentation, expansion, energy delivery or weight retention will be quite accurately observable. Further, in order to simulate a particular species such as the thick-skinned game found in Africa, the gelatin can be covered by other material such as metal or wooden plating. Because ballistic gelatin mimics muscle tissue and muscle tissue is common to all game, it is suitable for testing a wide range of ammunition. This in turn is crucial information for the ballistician, who is trying to create a projectile that will not only fly well, but also deliver a particular terminal effect. Ballistic gelatin has been engineered to its specifications precisely because it closely mimics the behaviour of muscle fibers in living creatures and can therefore tell us how a hunting bullet will perform on a real hunt. So, in order to develop better projectiles, scientists and ballisticians developed ballistic gelatin to simulate targets and study bullet performance in a repeatable way. However, as hunters we know how difficult it can be to derrive bullet performance in each particular hunting situation, with changing environments and targets. Getting a bullet on target is only half the battle so to speak, only the effect of the bullet on the target can validate a good shot. As a hunter or defense & law enforcement agent you are almost as dependant on the terminal ballistic performance of your ammunition as the exterior ballistics. As a target shooter you generally tend to dismiss this portion of ballistics completely, target shooting is all about exterior ballistics and getting hits on the mark. This sub-field of ballistics is called terminal ballistics and is obviously very important in military, police, security and hunting. Ballistic Gelatin, also known as ordnance gel or ballistic block, came about as a scientific testing method to study the performance of projectiles once they reached their target.
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