I shoot 125g Muzzy 3 blade heads and it took a bit of tunning to get them to hit with my fieldpoints but this should be expected. Tune your bow so that the broadheads and field points are hitting together. It'll take some tinkering but is easy enough todo.

For the practice blades I actually prefer to shoot sharp blades for practice. the practice blades differ from the real deal and to insure consistence I shoot the heads as I would at a deer. Best bet is to hit walmart after the season and stock up on blades. Set up 3 arrows for practice and just make sure to switch out the blades before you hunt.