Yep!
252 SpA

Grass Knot (120 BP) vs. 252 HP / 252+ SpD (and Tera Water)

216-257 (53.4 - 63.6%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
252 SpA

Grass Knot (120 BP) vs. 252 HP / 252+ SpD (and Tera Water)

180-214 (44.5 - 52.9%) -- 85.2% chance to 2HKO after Stealth Rock and Leftovers recovery
+2 252 SpA

Grass Knot (120 BP) vs. 252 HP / 252+ SpD (and Tera Water)

432-509 (106.9 - 125.9%) -- guaranteed OHKO
+2 252 SpA

Grass Knot (120 BP) vs. 252 HP / 252+ SpD (and Tera Water)

360-424 (89.1 - 104.9%) -- guaranteed OHKO after Stealth Rock