Reloading 308 brass for 7.62 Nato...

Bruiseleee

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I've read a bunch of stuff saying that the 7.62 Nato is lower pressure than 308.

Is there any reloading information for loading 7.62 Nato? The reloading manuals don't generally give pressure measurements for the lighter loads if any at all.

Any help would be greatly appreciated. :confused: :runaway:
 
I've always read that IMR4895 was developed as a military powder and is used by the military.
From the IMR site:
150 GR. NOS BT IMR 4895 .308" 2.800" 42.6 2631 42,300 PSI 47.3C 2920 57,700 PSI

So some Winchester or Hornady 150 Gr FMJ loaded with around 44-45 Gr of IMR 4895 should pretty well be in the ball park.

I posted this in Main Battle Rifles:

The dimensional specs of 7.62 X 51 and .308 are different.
However, I don't believe the pressure is much different.
I have read that the 50,000 PSI milspec is in CUP.
"Pressures for 7.62 are still taken in a copper crusher barrel and are recorded as psi because the DoD has not adopted the SAAMI designation of CUPs (Copper Units of Pressure)."

The SAMI 62,000 PSI is actual. CUP is always lower than PSI.

Nato spec is 2750 fps at 78 feet from the muzzle.

I cronyed an Indian NATO round and got 2821 about 10 ft from the muzzle.
I've chronyed factory whitebox Winchester FMJ .308 and got2713,2751,2745,2738,2757,2775,2758,2755,2734,27 70.
The yellow box Remington UMC 150 FMJ .308 was 2844,2780,2776,2856,2740.

So the commercial .308 is slower than Nato 7.62 - hard to believe the commercial is loaded hotter than the NATO.
 
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