Getting unfounded info from people on the internet is not research . I had a guy the shot at my range all the time and in all my matches . He had no idea what he was doing and was a joke . YET he wrote all kinds of internet " articles " and answered all kinds of questions . The end result is vast amounts of mis-information being spread by this .

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Here is an example of real research . I also wondered about the 6.5mm machine gun round compared to the old rifle round . SO , I fired some of both for velocity and pressure readings .