There was an article in the GCAJournal a while back, the exact article I can't re-read as we moved and when downsizing I gave all my older Journal's to members of the gun club I belong to. Using the GCA Journal searchable spread sheet I believe it was Issue 34-1-23 Winter 2019 first key word "M2 Ball Facts vs. Myth". It was a controversial stance but well researched, if you have access to the article it can provide additional insight.