There's some stuff going on in the BH thread where we're trying to cross-check a video you put there a while ago with recent findings. Verbatim was going to tag you but I think he did it wrong. Would you mind checking the thread and reading the last few pages?
The 244 conserved 4 EVs while still doing exactly what it was intended to do.
252 Atk Garchomp Earthquake vs. 252 HP / 40 Def Carbink: 224-266 (73.6 - 87.5%) -- 6.3% chance to OHKO after Stealth Rock
252 Atk Garchomp Earthquake vs. 248 HP / 44 Def Carbink: 222-264 (73.2 - 87.1%)
252 Atk Garchomp Earthquake vs. 244 HP / 44 Def Carbink: 222-264 (73.5 - 87.4%)