Nothing personal intended just asking a question. As a matter of fact I don't think any of those would be overkill. I don't buy into ovekill under kill theories. If a person did buy into that stuff then you'ld have to believe that none of the straightwalled handgun cartridges are adequate for killing game, and that would bring a huge uproar from folks that use the 44 mag and hot loaded 45 colts (myself included) I also don't see the benefits of using a belted 30 unless a person moves up into the 200 gr+ bullets where the real advantages for those cartridges really lives.
the most expensive bullet there is isn't worth a plug nickel if it don't go where its supposed to. www.historicshooting.com