diff --git a/addons/advanced_ballistics/functions/fnc_readAmmoDataFromConfig.sqf b/addons/advanced_ballistics/functions/fnc_readAmmoDataFromConfig.sqf
index d6081e6f9e..125c3677b8 100644
--- a/addons/advanced_ballistics/functions/fnc_readAmmoDataFromConfig.sqf
+++ b/addons/advanced_ballistics/functions/fnc_readAmmoDataFromConfig.sqf
@@ -44,6 +44,9 @@ if (!(_dragModel in [1, 2, 5, 6, 7, 8])) then {
     _dragModel = 1;
 };
 private _ballisticCoefficients = getArray(_ammoConfig >> "ACE_ballisticCoefficients");
+if (_ballisticCoefficients isEqualTo []) then {
+    _ballisticCoefficients = [0.5];
+};
 private _velocityBoundaries = getArray(_ammoConfig >> "ACE_velocityBoundaries");
 private _atmosphereModel = getText(_ammoConfig >> "ACE_standardAtmosphere");
 if (_atmosphereModel isEqualTo "") then {
diff --git a/addons/scopes/functions/fnc_calculateZeroAngleCorrection.sqf b/addons/scopes/functions/fnc_calculateZeroAngleCorrection.sqf
index 6cb53c3898..ab84db7cde 100644
--- a/addons/scopes/functions/fnc_calculateZeroAngleCorrection.sqf
+++ b/addons/scopes/functions/fnc_calculateZeroAngleCorrection.sqf
@@ -4,24 +4,28 @@
  * Calculates the zero angle correction for the new zero range based on current zero range and bore height (distance between bore- and sight axis)
  *
  * Arguments:
- * 0: Zero range <NUMBER>
- * 1: Bore height <NUMBER>
- * 2: Weapon <OBJECT>
- * 3: Ammo <CLASS>
- * 4: Magazine <CLASS>
- * 5: Advanced Ballistics enabled? <BOOL>
+ * 0: Old Zero range <NUMBER>
+ * 1: New Zero range <NUMBER>
+ * 2: Bore height <NUMBER>
+ * 3: Weapon <OBJECT>
+ * 4: Ammo <STRING>
+ * 5: Magazine <STRING>
+ * 6: Advanced Ballistics enabled? <BOOL>
  *
  * Return Value:
  * zeroAngleCorrection <NUMBER>
  *
  * Example:
- * [5, 6, gun, ammo, magazine, true] call ace_scopes_fnc_calculateZeroAngleCorrection
+ * [5, 6, 7, gun, ammo, magazine, true] call ace_scopes_fnc_calculateZeroAngleCorrection
  *
  * Public: No
  */
 
 params ["_oldZeroRange", "_newZeroRange", "_boreHeight"/*in cm*/, "_weapon", "_ammo", "_magazine", "_advancedBallistics"];
 
+// When FFV from vehicles currentZeroing will report 0 so just bail
+if (_oldZeroRange <= 0) exitWith { 0 };
+
 private _airFriction = getNumber (configFile >> "CfgAmmo" >> _ammo >> "airFriction");
 private _initSpeed = getNumber(configFile >> "CfgMagazines" >> _magazine >> "initSpeed");
 private _initSpeedCoef = getNumber(configFile >> "CfgWeapons" >> _weapon >> "initSpeed");