Earlier there were some discussions of the overload capability of the SA-2 missiles...
... here they are, from the official materials.
V-755 20D (Guideline Mod.3) 6.5g
V-760 15D (Guideline Mod.4) 5.8g
V-759 5Ya23 (Guideline Mod.5) 9g
V-760V 5V29 (Guideline Mod.4) 6.5g
Overload capability depending on altitude.
Overload chart of the V-755 depending on altitude and range (missile speed).