m305 .308

Old School .308 Winchester Match Loads
http://www.provenreloads-handloads.com/articles/2016/9/18/old-school-308-winchester-match-loads

m14 service rifle load data
https://www.google.com/search?source=hp&ei=14qhWom7HpKn5gKQqZu4Dg&q=m14+service+rifle+load+data&oq=m14&gs_l=psy-ab.1.0.35i39k1j0i131k1j0i131i20i264k1j0i20i264k1j0j0i131k1j0l4.2643.4439.0.10645.4.3.0.0.0.0.117.306.2j1.3.0....0...1c..64.psy-ab..1.3.304.0...0.h5YxobMK8JA

Below the powder was switched from RL15 to IMR 4064 due to RL15 being temp sensitive in Iraq and Afghanistan for long range sniper ammo.

Cartridge, Caliber 7.62mm, NATO, Ball, Special, M118LR (United States): 175-grain (11.3 g) 7.62×51mm NATO Match-grade round specifically designed for long-range sniping. It uses a 175-grain (11.3 g) Sierra Match King Hollow Point Boat Tail bullet. Produced at Lake City Army Ammunition Plant. The propellant's noticeable muzzle flash and temperature sensitivity led to the development of the MK 316 MOD 0 for Special Operations use.

"Cartridge, Caliber 7.62mm Special Ball, Long Range, MK 316 MOD 0 (United States): A 175-grain (11.3 g) round specifically designed for long-range sniping consisting of Sierra MatchKing Hollow Point Boat Tail projectiles, Federal Cartridge Company match cartridge cases and Gold Medal Match primers. The Propellant has been verified as IMR 4064 (per NSN 1305-01-567-6944 and Federal Cartridge Company Contract/Order Number N0016408DJN28 and has a charge weight per the specs of 41.7-grains.

https://en.wikipedia.org/wiki/7.62%C3%9751mm_NATO
 
I have always had good luck with IMR 4895 in my norc M14s, cannot remember the exact amount of powder but my load is just above a starting load with a good firm crimp and 150 gr Hornady FMJs.
 
Just remember with these rifles that the headspace may be a bit generous. It's best to check your brass each time for hairline splits near the shoulder or bulging. One of my rifles has a 1.640+ headspace, far above the 1.634 'match' spec, so I reload each casing 3 times and just toss it. I make sure that I always have a few hundred pieces of Federal brass on hand, because where I live there's not enough people to create a large zombie swarm. There's some good information out there showing how you can check your headspace. A few pieces of fired brass can be inserted into a rudimentary gauge, which is two pieces that screw together, and they tell you the approximate headspace. The other way is to pull off the oprod, chuck a gauge in the chamber, and use those shim gauges to check the distance between the lugs and the bolt. If you want your chamber tight, don't just screw the barrel on tighter (like I do), consider sending it to a gunsmith.

You can also send it to Marstar if you want to weld bits to the front of the bolt lugs, I heard it triples the value of your rifle as well as the chance of it blowing up in your face.
 
With the 150 FMJBT, my tried and true recipe for my M14 and 308 Garand is 41.5 grains of H4895 in RP or Winchester brass.
 
I found it took 43 grains of either h4895 or I'm 4895 to hit 2750 fps in nato(ivi and da) cases. Not sure about lake City.
This is a pretty standard 147gr M80 clone load and.should be easy on your oprod.
 
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