The 7.62 Nato round must meet the requirements of Stanag 2310. See the Stanag list here:
https://nso.nato.int/nso/nsdd/listpromulg.html
Nato EPVAT testing is described here:
https://en.wikipedia.org/wiki/NATO_EPVAT_testing
Note, the rounds are oiled. Explain that Hatcherites.
Each weapon and component considered vulnerable to the effects of a rapid change in pressure, for example barrels, breech blocks and bolts, will be tested by firing one dry round at a corrected minimum of 25% over pressure and one oiled round at a corrected minimum of 25% over pressure. 25% over pressure means 25% in excess of the Service Pressure (Pmax). The Service Pressure is defined as the mean pressure generated by the Service Cartridge at a temperature of 21 °C (70 °F). Such a high pressure proof is conducted with both the weapon and ammunition conditioned to an ambient temperature of 21 °C (70 °F).
1) You present that quote as if it is from some STANAG, however a perusal of all the relevant STANAGs (2310, 4090, 4172, 4173, and 4383) in my library fail to reveal that requirement anywhere. Do you have a source for this?
2) Acceptance testing requirement for all US weapons is outlined the appropriate military specifications and drawings, such as MIL-DTL-70599 and for the M4A1 Carbine. For all of these specifications, the proof test requirements are "
one ... high pressure test cartridge in accordance with drawing [relevant drawing for 5.56mm, 7.62mm, 9mm, or Caliber .50 HPT round]". Further, there is no mention of a lubrication requirement. The M4 series being unique in the allowance of SAAMI-Z299.4 specification proof rounds as an acceptable alternate, but still no oil.
3) EPVAT testing of all US 7.62mm ammunition is done under the requirements of SCATP-7.62mm, Test Procedures for 7.62mm Cartridges. other that the requirements for the NATO design EPVAT Barrel and Kistler 6215 Transducer, the data listed in the Corrected Proof Pressure Requirement (Service Pressure (Pmax) + 25%) table is incorrect for
all United States service ammunition. This table is actually lifted from DEF-STAN 05-101, Proof of Ordnance, Munitions, Armour and Explosives, Ministry of Defence, which is
a British Military specification, and not applicable to anybody other than the British.
4) Lubricating cartridges does not increase the chamber pressure, but it does increase the bolt thrust and case stress by the loss of friction between the case and the chamber wall. In old, weak, or actions of inadequate strength this might be a problem, and especially so if the loads are at the upper end of the pressure spectrum. If you lubricate cases, you should monitor the case head and primer pocket diameters for enlargement, as this is an indicator of nearing the limits of what the case is designed to withstand.