[Dave R]

If you are using proper 'varmit' bullets, and not FMJ military bullets, you have done a lot to reduce the risk of ricochet already. Varmit bullets are designed to come apart when they hit a relatively small, soft varmit. That means they should come apart when hitting a rock or anything else. That means they don't ricochet very well.

That doesn't mean it can't happen, but its probably less likely that getting a ricochet from a reduced-power load using a FMJ bullet.