It is interesting the topic of bullets was brought up--in the same article I quoted from earlier..bullets were another important part of the test..per the article a LOT of bullets were tested in various mediums, distances,, etc...per the article the final winner was the 136 gr Lapua Scenar-L. that produced the best accuracy and terminal effects..

Per the article, one of the other advantages of the 6.5CM vs the .260REM is the longer bullets take up less powder room because of the neck-shoulder junction on the 6.5CM

Article also stated this is the first time in modern history the .308 (7.62) has lost ground with the US military