The longer the bullet, the less likely to sod off at weird angles is my take from doing this over the years. It's something that just happens in thick bush, can't really avoid it.
If you look at the calibers people have said go well through stuff, .243 100gr and Swede 6.5mm - they are the higher weights and longer for the caliber than lighter bullets. That seems to be the deciding factor, if you think a .22LR which are horrendous for richochet they are barely as long as wide. I missed four shots on one bunny accidentally clipping a fence wire (no8 type) between me and the target as it was only a wee bit in front of the muzzle and not visible through the scope. Didn't work out what was happening until the fourth one where me offsider saw the wire wiggle. Had that one other time with a centerfire (exactly the same deal) and it pinged the wire in two and still went where it was aimed. Much to my mates disgust, as he had to fix the fence...
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