There are changes at the Parallax since the last patch. You need to aim lower at high ranges (at 250m I have to aim to the neck to OHK). Anyone confirme this ?
It seems to have affected the Parsec as well. I was told about this little bug regarding the Parallax yesterday, and after I picked it up, I find that it seems to be true. The Parsec's bullet rise was exacerbated even more by this patch, so it seems to have affected more than just one bolt-action. I cannot confirm that the V10 or XM98 are afflicted by this, however. -Stay Fr0sty
I've seen this with every weapon. It's not consistent though, some people are turtles, some aren't, sometimes they're just temporary turtles.