Well I'll admit that I am beginning to rethink my original prejudice on using the 223 and 222 for deer especially with some of the newer premium bullets. Based on the explosive nature of the traditional c&c bullets I use to see on groundhogs I would have been hesitant thinking if I hit a rib the lighter c&c bullets bullet may not penetrate.obviouslt if you slide it between the ribs it would be fine or if you hit them in the head but I would want to definitely use a premium bullet there. However I will say the giraffe story really is surprising.those bad boys can be 2or 3 times the weight of an elk and would have the skeletal structure to match I'm guessing. That's some stunt shooting for sure.