cool, thanks for all the info guys...
In response to one question, the depredation permit states "any legal weapon" so I'm guessing I probably can't use the suppressors since they are illegal for hunting in general. Oddly enough it is perfectly legal to large game hunt with a .22 long rifle here and I've taken quite a few with my ruger 10/22 however it's limited by range.
the .44 mag maybe what I use, I have another thread going in the 'reloading' section here about scaling down a .30-06 for subsonic use, but I'll probably just stick with the .44 as it's probably the best for this endeavor.
Cost is a real concern as well as noise, I'm very cash poor, so I can't really afford to go out and buy a bunch of different bullets to test out, hence me asking on here first so I can get a good idea of where to start out at.
Thanks again for all the good info!