6mm Grendel Group Design Project

[BluntForceTrauma]

In the case of 7.62 NATO developers, the evidence shows they were not hidebound in their thinking on this matter. When development started in 1945, instead of rigidly copying the 17-degree shoulder of the venerable .30-06 case, they elected to use a 30-degree shoulder. It was only after a few years of test and evaluation that shoulder angle was changed to 20 degrees, a fact which says to me that the 30-degree shoulder likely caused feeding or chambering issues.

Solid reasoning, Stan, can't fault it. But none of us knows conclusively if the change was due to technical merits or politics or hidebound thinking. All of which, to me, are distinct possibilities. You know the sordid history of small arms development in this country as well as I.