Lets play Name that round!

[Craig0ry]

Alright I have a round and I have no clue what it is, Its the furthest left pictured beside a 17hmr and 17m2.

Second one I think is says 4.5x30 but I could be wrong as the crimp covers it.

 

[dinsdale]

HK 4.6×30mm.

http://en.wikipedia.org/wiki/HK_4.6×30mm

 

[diananike]

The rimfire one is a .17 Aguila which predated the .17HM2 by a little bit,
never took off as they don't even sell aguila ammo up here and the mexican firearms industry is seperated from us by the worlds largest.