Nope did not make the shot -- but I do know one end of a rifle from another.
I've shot with CWO(3) Haugen (ret.) when he was in Lewis...
and I dicked with Gene Econ's tgt during a Police Sniper course
(years later it dawns on him what we did)
I had some early LandWarfare 5.56mm - Stan had said that since it that lot they have improved the accuracy. I shot it at 100m and 200m from the prone from a KAC SR16 16" midlength with Douglas barrel -- the carbine is submoa with some ammuntion. it chrono'd ~10 shot avg at 3800 fps out of the 16" bbl.
I did say it was my humble opinion that the ammuntion was over pressur spec -- HOWEVER I have shot it both suppressed and unsuppressed and do not beleive that it is unstable or dangerous. No idea on the agencies methodology for testing pressure.
I did not get enough 7.62N for accuracy testing one guy zero'd it with his rifle and it was then used for live test.
I have never been able to chrono the 9mm (I ended up mixing Ranger SXT in a Sig mag to see if the chrono was buggered - no dice onyl thr SXt tracked in the chrony) that was repeated at different dates (no idea on that one) it struck the tgt fine...
I recall several times stating the ammo works.