There is nothing wrong with a .243 and at 30 yards it would have passed through if you didn't find any hair or blood then you missed hunt it again I would and if you hit him he may not have rolled or anything .243 usually delivers a ton of shock I've never had one run with a hit from a 243 lol I shot a spike at about 10 yards and he went nowhere didn't even flip his tail or kick. He weighed 140