Answer :
Final answer:
The correct option is 3) Insert a marked ramrod to measure the inside length of the barrel. To determine if a muzzleloader is loaded, inserting a marked ramrod into the barrel to measure the inside length is the recommended method, as it safely and effectively indicates whether the gun is loaded.
Explanation:
The correct option is 3) Insert a marked ramrod to measure the inside length of the barrel. To determine if a muzzleloader is loaded, one should insert a marked ramrod into the barrel to measure the inside length. This method is both safe and reliable compared to attempting to see through the barrel or shaking it to hear a rattling ball.
By inserting a ramrod that is marked at a length equivalent to the unloaded barrel length, one can quickly ascertain whether there is an extra length indicating that the gun is loaded with a ball and/or powder. This technique leverages the simple principle of physical measurement and avoids the potential hazards associated with the other methods mentioned.