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Best surplus ammo for nato 7.62x51 Enfield Pt 2

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Goosic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goosic Quote  Post ReplyReply Direct Link To This Post Posted: April 09 2020 at 11:35am
Can you supply us with a side by side comparison with 303B proofing methods please?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goosic Quote  Post ReplyReply Direct Link To This Post Posted: April 09 2020 at 4:04pm
Originally posted by The Armourer The Armourer wrote:

 

They used the standard proof round for 7.62 NATO.

But as a comparison the 308 SAAMI proof round is 35+ tonnes.





Interesting that 308 has higher pressures than 7.62 NATO

Comparisons :


This is exactly why the 308 is listed has having a higher PSI then that of the NATO 7.62

NATO EPVATEdit

NATO defines 5.56mm, 7.62mm, 9mm and 12.7mm using the NATO EPVAT test methods, which includes pressure testing. Unlike the civilian testing methods NATO EPVAT testing procedures for the "NATO rifle chamberings" require the pressure sensor or transducer to be mounted ahead of the case mouth. The advantage of this mounting position is that there is no need to drill the cartridge case to mount the transducer. Drilling prior to firing is always a time-consuming process (fast quality control and feedback to production is essential during the ammunition manufacturing process). The disadvantage of this mount is that the pressure rises much faster than in a drilled cartridge case. This causes high frequency oscillations of the pressure sensor (approx 200 kHz for a Kistler 6215 transducer) and this requires electronic filtering with the drawback that filtering also affects the lower harmonics where a peak is found causing a slight error in the measurement. This slight error is not always well mastered and this causes a lot of discussion about the filter order, cutoff frequency and its type (Bessel or Butterworth).[9] For the 9mm NATO EPVAT specifies that for 9×19mm Parabellum (9mm Luger in C.I.P. nomenclature and 9mm NATO in NATO nomenclature), the transducer must be positioned at the mid case position (9.5 millimetres (0.37 in)) from the breech face instead of C.I.P.'s 12.5 millimetres (0.49 in) from the breech face. For NATO EPVAT testing of military firearms ammunition NATO design EPVAT test barrels with Kistler 6215 channel sensor transducers are used

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Post Options Post Options   Thanks (0) Thanks(0)   Quote britinbc Quote  Post ReplyReply Direct Link To This Post Posted: August 11 2020 at 3:19pm
Hi All
        interesting thread
    i was about to ask if it was ok to use 308, as 7.62x51 is getting harder to find
    but i dont need to now 
      cheers J 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Goosic Quote  Post ReplyReply Direct Link To This Post Posted: August 11 2020 at 3:59pm
Federal Ammunition makes a factory 175grn .308 round that can definitely be used in a rifle chambered for the 7.62x51mm NATO. 
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