In terms of muzzleloading firearms, what does the term "inline" refer to?

The term "inline" in the context of muzzleloading firearms refers specifically to the arrangement of the ignition system. In inline muzzleloaders, the ignition system is designed so that the primer or ignition source is positioned directly in line with the barrel. This design allows for a more streamlined loading process and can enhance the accuracy of the firearm by placing the ignition source at the rear of the barrel in a straight line with the projectile.

This arrangement contrasts with traditional muzzleloaders where the ignition system may be offset or placed in a less direct alignment with the barrel. The inline design is particularly popular among modern hunters and sport shooters, as it can improve ignition reliability and reduce hangfires due to a more direct path for the ignition flame to travel from the primer to the powder charge.

In summary, the key feature of an inline muzzleloader is its ignition system's linear arrangement, enhancing performance and user experience in loading and firing the firearm.