Here is some load data that I have posted in the past REMEMBER do your own load work up, I can tell you in 99.9% of all rifles there safe but what works good in mine may not work in yours. These listed loads are mild in preasure in my rifles!!
Varget is a slow burning powder thats close to IMR-4064 in burn rate, like any late blooming powder one must keep a eye on not overloading the case too much powder overloads the gas system opening a big can of worms we don't need or want.
I use military cases, if you are loading comercial cases you will need too add about +1.0grs of powder to acheve the same M/V. US Military ammo M/V was measured at 78ft from the barrel and 7.62mm Match(M-118NM and M-852) is listed as 2550fps, At the muzzle with our RELOADS we are looking for about 2600fps with both the 168gr and 175gr pills theres no need to push them any harder as all that does is beat our rifles.
I strongly advise that if you have access to a chronograph now is the time too use it!
Full Lenth sizing is a must the use of a Small Base sizer may or may not be needed, and if using military cases primer swaging is a must but its a one time job.
Resize your brass and trim to lenth 2.005
I use Winchester Large Std Rifle primers
41.0grs of Varget
Any 168 pill, Nosler shoots just as good as the Sierra just cheaper
COAL of 2.80-2.82
This load gets me a smidge over 2600fps over a chrono and is a great load for your NM and M-21, from 200yds to 600yds on calm days.
For the NM and M-21, 600yds any Long Range fun or when the wind picks up, same case prep as above and a switch too the 175gr pill COAL moves out to 2.82 the 175's are just a tad longer, a bump in the charge to 41.5gr of Varget makes for a great clone load of the current M-118LR ammo.
Yes these COAL will feed from your magizines.
For a great offhand and sitting rapid reduced recoil load this gives the Ar shooters fits, same case prep as above.
41.0grs Varget
WLRP
125 Speer TnT
Coal 2.70
For IMR-4895 and H-4895 powders same case prep and seating depths but charges go 41.5grs for the 125 and 168's, the 175's go 42.0grs
AA2520 isn't the "Camp Perry Powder". IMR DuPont has powdered and WON more Nationals than any maker.