I'm pretty happy with my HMR, it's great for rabbits and long range corvids. Head shots on the rabbits are a must and I've never had any issues whatsoever with copper shards in the carcasses. I've only ever shot two foxes with it and they just rolled over stone dead - perfect, precision head shots at around yards. It just does the business
I will definately plum for a .22lr and centrefire rifle at a later date, perhaps a .204 as I've heard very good things about them. More research needed nearer the time though and when funds permit (probably years!)