User blog comment:Callofduty4/How to play BC2/@comment-92.113.99.104-20100919075134

Magnum decreases the bullet drop, which is extremely useful for long range sniping with a 12X scope.

You blame RDS and ACOG for nothing. They're good for medium range support, so you can be on the frontlines guarding your teammates and spotting the enemies. Also, it's easy to get headshots with the ACOG, because it uses a chevron reticle.