Salut Louky!
a Marlin in 44 mag is a wise choice in France, it's classed in catégory 5 (yet)and it's quiet easy to find ammo for this one! I don't know if it will be well accepted for hunting in France ( hunters are quiet conservative here) but it's a great carabine! Mine is loaded with 44 special silvertip for " home defense", and for wild pigs the 300 grs cast bullet (helmeir Keith type) from Federal is just great! The 44 mag offer plenty of possibilities for almost every uses!
Hurry to buy it cause in France they speak to class it in Category 4, wich mean you'll have to get a firearm autorization trough a shooting club ,wait 6 month of membership and all the paperwork, just for the pleasure of own one!