Which type of ammunition is known for its low expansion and high penetration capabilities?

Full metal jacket ammunition is specifically designed to maintain structural integrity upon impact, allowing it to penetrate targets effectively without significant expansion. This characteristic makes it ideal for military applications and certain law enforcement uses where deep penetration is necessary. The jacket encasing the bullet reduces deformation during flight and impact, providing a more streamlined path that helps it to penetrate barriers and materials more efficiently.

In contrast, frangible ammunition is designed to disintegrate upon impact with hard surfaces, minimizing ricochet risk, and hollow-point ammunition is engineered to expand upon impact to maximize stopping power. Jacketed soft point ammunition features a soft lead tip that expands upon hitting a target but does not offer the same level of penetration as full metal jacket ammunition. Thus, full metal jacket ammunition stands out due to its unique combination of low expansion and high penetration capabilities.