Re: 52gr, A-max for head shot on deer?
Better if we keep to the requested info... we're sneaking over into the judgemental area a bit.
I've shot quite a few deer in the head (brain, not face) with the little 223 and light Sierra Matchkings without a problem. I've also shot them in the head at ranges a bit exceeding 300 yards but that was with a 6mm-06 and the 107 MK... They don't go far!!
I prefer to take the shot when they're grazing peacefully, head to the ground face on toward me or head erect facing straight away as it gives me a clear shot to the brain without too many bones.