Board Thread:Speculation House/@comment-97.95.183.188-20151028155331/@comment-25396609-20151028183445

A hunting rifle such as Pyrrha uses does not have enough firepower, even with AP rounds, to penetrate thick armor.

Machine pistols are the same

Ruby was not fighting armored enemies and as such the properties of armor piercing rounds would not be apparent.

As I said, an armor piercing round OF SUFFICIENT CALIBER.

Even not taking armor piercing rounds into account, metal bullets are far more effective than would be stone, as despite being hard it is quite brittle.