diff --git a/addons/rangecard/functions/fnc_calculateRangeCard.sqf b/addons/rangecard/functions/fnc_calculateRangeCard.sqf
index 7edd865ddc..2cdcb391f5 100644
--- a/addons/rangecard/functions/fnc_calculateRangeCard.sqf
+++ b/addons/rangecard/functions/fnc_calculateRangeCard.sqf
@@ -17,8 +17,9 @@
  * 11: ballistic coefficient <NUMBER>
  * 12: drag model <NUMBER>
  * 13: atmosphere model <STRING>
- * 14: Range Card Slot <NUMBER>
- * 15: Use advanced ballistics config? <BOOL>
+ * 14: transonicStabilityCoef <NUMBER>
+ * 15: Range Card Slot <NUMBER>
+ * 16: Use advanced ballistics config? <BOOL>
  *
  * Return Value:
  * Nothing
@@ -33,7 +34,7 @@ params [
     "_scopeBaseAngle", "_boreHeight", "_airFriction", "_muzzleVelocity",
     "_temperature", "_barometricPressure", "_relativeHumidity", "_simSteps",
     "_windSpeed", "_targetSpeed", "_targetRange", "_bc", "_dragModel", "_atmosphereModel",
-    "_rangeCardSlot", "_useABConfig"
+    "_transonicStabilityCoef", "_rangeCardSlot", "_useABConfig"
 ];
 
 GVAR(rangeCardDataMVs) set [_rangeCardSlot, format[" %1", round(_muzzleVelocity)]];
@@ -96,8 +97,7 @@ while {_TOF < 6 && (_bulletPos select 1) < _targetRange} do {
     _stepsTotal = _stepsTotal + 1;
     _speedAverage = (_speedTotal / _stepsTotal);
 
-    if (_speedAverage > 450 && _bulletSpeed < _speedOfSound) exitWith {};
-    if (atan((_bulletPos select 2) / (abs(_bulletPos select 1) + 1)) < -2.254) exitWith {};
+    if (_transonicStabilityCoef < 1.0 && _speedAverage > 450 && _bulletSpeed < _speedOfSound) exitWith {};
 
     _trueVelocity = _bulletVelocity vectorDiff [-_windSpeed, 0, 0];
     _trueSpeed = vectorMagnitude _trueVelocity;
@@ -115,6 +115,8 @@ while {_TOF < 6 && (_bulletPos select 1) < _targetRange} do {
     _bulletPos = _bulletPos vectorAdd (_bulletVelocity vectorMultiply (_deltaT * 0.5));
     _bulletVelocity = _bulletVelocity vectorAdd (_bulletAccel vectorMultiply _deltaT);
     _bulletPos = _bulletPos vectorAdd (_bulletVelocity vectorMultiply (_deltaT * 0.5));
+    
+    if (atan((_bulletPos select 2) / (abs(_bulletPos select 1) + 1)) < -2.254) exitWith {};
 
     _TOF = _TOF + _deltaT;
 
diff --git a/addons/rangecard/functions/fnc_updateRangeCard.sqf b/addons/rangecard/functions/fnc_updateRangeCard.sqf
index 41234376fc..23a63641c5 100644
--- a/addons/rangecard/functions/fnc_updateRangeCard.sqf
+++ b/addons/rangecard/functions/fnc_updateRangeCard.sqf
@@ -21,7 +21,7 @@
 disableSerialization;
 #define __dsp (uiNamespace getVariable "RangleCard_Display")
 
-private ["_airFriction", "_ammoConfig", "_atmosphereModel", "_barrelLength", "_barrelTwist", "_bc", "_boreHeight", "_cacheEntry", "_column", "_control", "_dragModel", "_i", "_muzzleVelocity", "_offset", "_row", "_weaponConfig", "_initSpeed", "_initSpeedCoef"];
+private ["_airFriction", "_ammoConfig", "_atmosphereModel", "_transonicStabilityCoef", "_barrelLength", "_barrelTwist", "_bc", "_boreHeight", "_cacheEntry", "_column", "_control", "_dragModel", "_i", "_muzzleVelocity", "_offset", "_row", "_weaponConfig", "_initSpeed", "_initSpeedCoef"];
 
 params ["_zeroRange", "_ammoClass", "_magazineClass", "_weaponClass"];
 
@@ -103,6 +103,7 @@ _bc = 0;
 if (count (_ammoConfig select 6) > 0) then {
     _bc = (_ammoConfig select 6) select 0;
 };
+_transonicStabilityCoef = _ammoConfig select 4;
 _dragModel = _ammoConfig select 5;
 _atmosphereModel = _ammoConfig select 8;
 _boreHeight = 3.81;
@@ -170,10 +171,10 @@ if (isNil {_cacheEntry}) then {
             private _mvShift = [_ammoConfig select 9, _x] call EFUNC(advanced_ballistics,calculateAmmoTemperatureVelocityShift);
             private _mv = _muzzleVelocity + _mvShift;
 
-            [_scopeBaseAngle,_boreHeight,_airFriction,_mv,_x,EGVAR(scopes,zeroReferenceBarometricPressure),EGVAR(scopes,zeroReferenceHumidity),100,4,1,GVAR(rangeCardEndRange),_bc,_dragModel,_atmosphereModel,_forEachIndex,_useABConfig] call FUNC(calculateRangeCard);
+            [_scopeBaseAngle,_boreHeight,_airFriction,_mv,_x,EGVAR(scopes,zeroReferenceBarometricPressure),EGVAR(scopes,zeroReferenceHumidity),100,4,1,GVAR(rangeCardEndRange),_bc,_dragModel,_atmosphereModel,_transonicStabilityCoef,_forEachIndex,_useABConfig] call FUNC(calculateRangeCard);
         } forEach [-15, -5, 5, 10, 15, 20, 25, 30, 35];
     } else {
-        [_scopeBaseAngle,_boreHeight,_airFriction,_muzzleVelocity,15,EGVAR(scopes,zeroReferenceBarometricPressure),EGVAR(scopes,zeroReferenceHumidity),100,4,1,GVAR(rangeCardEndRange),_bc,_dragModel,_atmosphereModel,4,_useABConfig] call FUNC(calculateRangeCard);
+        [_scopeBaseAngle,_boreHeight,_airFriction,_muzzleVelocity,15,EGVAR(scopes,zeroReferenceBarometricPressure),EGVAR(scopes,zeroReferenceHumidity),100,4,1,GVAR(rangeCardEndRange),_bc,_dragModel,_atmosphereModel,_transonicStabilityCoef,4,_useABConfig] call FUNC(calculateRangeCard);
     };
 
     for "_i" from 0 to 9 do {