AR15: You can pick off prairie dogs at 300 meters all day long
AK47: You can pick off a deer pretty easy at 300 meters
Mosin-Nagant: You get out of your truck, see an elk on top of a hill, and realize you really can use iron sights that far.
AR15: You measure your misses by sub MOA measurements
AK47: You miss and, and aim a bit lower this time.
Mosin-Nagant: Even if you miss the shockwave of the bullet will kill the animal.
AR15: You are careful to keep in clean in the field.
AK47: You don’t worry so much about some dirt getting in it.
Mosin-Nagant: It still has gritty grease inside it from when the Finnish army put it into storage.