The raptor most likely to kill its prey with its powerful grip is...

The Red-tailed Hawk is known for its strong grip, which is a key characteristic that enables it to effectively kill and hold onto its prey. These hawks possess impressive talons that are highly adapted for hunting. When they catch their prey, the grip applied by their talons is powerful enough to penetrate and subdue, making it easier for them to consume their meal.

Red-tailed Hawks often hunt larger prey, including small mammals like rabbits and rodents, and their formidable grip is essential for capturing and controlling these animals. In falconry, understanding the specific hunting strategies and adaptations of different raptor species is crucial, and the Red-tailed Hawk's robust gripping ability is a significant factor in its success as a hunter in the wild.

While other raptors listed may have their own unique hunting adaptations, such as agility or speed, the strength of the grip specifically aligns with the Red-tailed Hawk's hunting technique and prey preference, making it the most likely choice for this question.