The stats should be up to date. The latest patch (March 15 2016) did not affect weapons, and Match 1st 2016 patch is listed on pages.
The BFH stats are for PC only (which seems to be your platform anyways). The damage multipliers of different body parts could be interfering here, only upper body area has 1.0x multiplier.
Also there used to be some mistakes in health indicator in BF4 years ago (health meter did not show correct health, off by several numbers if I recall correctly). BFH could have this same bug as it branched from BF4 long ago.