"7.6 P 58" - what is it?

[lone-wolf]

Looks like 762 nato/cetme, fmj, 1958 date of manufacture, and I guess the P is likely for Spain?
Which is a problem cause that seems like it's right around the time they were screwing around with reduced powder charges compared to the 762 nato and maybe lighter bullets too?
Unfortunately I bought 40rnds loose in a baggy without a box, could of been a neat collector item if my assumptions are right.

 

[Craig0ry]

Cetme 7.62 is correct. has a plastic core bullet under a small lead base. I have a few hundred rounds. I havnt shot any yet but I've pulled a few ans cut a few of the bullets. the fellow I got them from said he was only able to achieve a 6" group. I was planning to try them in my fr7 and fr8 rifles.