I have several manuals that list different loads for civilian & military spec loads for the caliber in separate sections.
Which would they be? Id be interested in checking them out.
I use Sierra, Hornady, and Speer's current (and older manuals), and none of them list 7.62x51 loadings. Hornady has a .308 Service Rifle listing, but that is simply loads geared to the M1A/M14, and not something 7.62x51 specific. Same for the 30-06 and the M1.
I had a friend who worked for the Lake City Arsenal back in the 60's, who had a manual that had their loads, for everything they loaded ammo for, which I have a copy of. The manual is dated 1969, and long out of date. It does list the various loads the military was using for the 7.62x51, but at the time, those powders were not available to us, or at least I was never able to find any. 30-06 was using IMR 4895, and those loaded were easily duplicated. (The manual is dated 1969, and long out of date.)
Most of what I load the military .30 calibers for, are older, military rifles, and I load them to, or as close to, the specs called out for those rifles (bullet velocity, type, weight, OAL, etc), and especially the auto loading rifles.
The only rifle had I had issue with brass wise, was my 7.62x51 Indian Ishpore. None of the other rifles in either .308 or 30-06, have had any issues.
I do believe the Ishpores issue was more headspace related, than it was ammo related though.