sounds to me - based on years of reading about this issue - that you need to buy a lotto ticket 
as i said - its possible that the QC issues may have corrected itself now that ammo production is coming back up.... i haven't had to buy HMR ammo for a while now - i found a couple of the good lots and stacked it deep when it was plentiful a few years back.
i'm still settling my new A17 in and have yet to shoot it on a calm day to really get a feel for its accuracy potential. I was getting about 2-2½ moa out of the A17 box i have on the shelf, but that was bucking some pretty serious wind. It did seem to be happier with the 2550 box i had here from one of my cherry picked lot numbers outa the stash, but again thats still very subjective based on limited testing so far in less than ideal conditions. 15-25 mph isnt conducive to good group testing with the HMR even if you're trying to time between the gusts.
