Hi Christian,
Shooting in Ireland is either Deer (Sika,Red,Fallow) or Rough Shooting (Pheasants,Wildfowl,Rabbits etc..).
Deer stalking is normally on state lands by paying for a lease.
Rough shooting is mainly through Gun Clubs who are all members of the NARGC (National Association of Regional Game Councils)
www.nargc.ie
If you contact me off-list via my email I may be able to assist you further as I'm a gun club member near Dublin.
regards,