What is the key feature of a centerfire slugshell?

A centerfire slugshell is specifically designed to contain a single lead projectile, which is the key feature that differentiates it from other types of ammunition like shotshells. While shotshells are loaded with multiple small pellets, a slugshell focuses on delivering a single, larger projectile designed for greater accuracy and stopping power at longer distances. This makes slugs particularly effective for hunting larger game, as they provide greater penetration and knockdown capability compared to multiple pellets.

In essence, the design of a centerfire slugshell allows it to perform differently than traditional shotshells, making it suitable for different hunting scenarios and species. The other options do not accurately describe the characteristics of a centerfire slugshell, reinforcing the prominence of the single lead projectile in understanding its function and use in hunting.