Up here in Finland silencers are also legal and very much used both in hunting and
target shooting. There are several local manufacturers and several designs.
Generally you can say that accuracy is improved and velocities slightly increased
after mounting of a silencer.
Myself I have silencers on 308, 7mm RM, 338WM and a 30-06.
I would encourage to check out the following sites:
-they are the best and most expensive and have a distributor in NZ as well
Reflex Suppressors Index Page
-make a good all round silencer that is partially on the barrel to cut down on overall length.
-good pictures to check out.