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Military 7.62 specs

2K views 4 replies 5 participants last post by  John Coleman 
#1 ·
#4 ·
Yes, that is a good reference and contains a lot of very useful information. But, much of it is outdated, so you need to cross-check against more current sources such as the latest TMs.

Ray
Indeed, most obviously the pressure specs are just wrong. The military writers confused PSI for C.U.P., but that's been the subject of numerous posts on this forum, and still leads to misinformation regarding the old "308 vs 7.62 NATO" debate.

JWB
 
#5 ·
The pressure specs look to be from one of the old , "TM" technical manuals that have general information about the ammunition. The pressure specs are rounded off at best. The M80 cartridge has a lower average pressure limit and a different single round, absolute pressure limit. The M118 and M852 cartridges both have higher average pressure limits and different absolute single round pressure limits.

When M118 LR switched to being produced by ATK with a few new details, ATK published some of the details in advertising. One of them being a pressure that is equal to SAAMI 308 Winchester pressure limit and then included a number that may be the SAAMI single round limit but was higher than SAAMI average pressure limit. This was back when the pressure limits were in CUP copper units which are also expressed in PSI. Some people thought the ATK M118 LR published pressure limit was a new, higher pressure limit. The older cartridges, M118 and M852, both always had higher pressure limits than M80 ammunition, none of them were expressed correctly in the general information TM's though. There are some other documents around that have the correct information. It just wouldn't have made the ammunition TM's any more useful though, as there weren't anything that could be adjusted. The numbers published in TM's are good enough for general information though.
 
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