diff --git a/java/squeek/tictooltips/TooltipHandler.java b/java/squeek/tictooltips/TooltipHandler.java
index 4a4ebcf..f180817 100644
--- a/java/squeek/tictooltips/TooltipHandler.java
+++ b/java/squeek/tictooltips/TooltipHandler.java
@@ -624,6 +624,15 @@ public List<String> getBowTooltip(ToolCore tool, NBTTagCompound toolTag, ItemSta
 				if (ToolHelper.hasToolTag(currentAmmo) && currentAmmo.getItem() instanceof ToolCore)
 				{
 					toolTip.addAll(getWeaponTooltip((ToolCore) currentAmmo.getItem(), ToolHelper.getToolTag(currentAmmo), projectileWeapon.getProjectileSpeed(itemStack)));
+
+					float[] critDamageRange = ToolHelper.getCriticalDamageRange((ToolCore) currentAmmo.getItem(), ToolHelper.getToolTag(currentAmmo), projectileWeapon.getProjectileSpeed(itemStack));
+					if (critDamageRange[1] != 0)
+					{
+						EnumChatFormatting textColor = critDamageRange[0] >= 0 ? EnumChatFormatting.DARK_GREEN : EnumChatFormatting.DARK_RED;
+						String bonusOrLoss = (critDamageRange[0] >= 0 ? StringHelper.getLocalizedString("gui.toolstation4") : StringHelper.getLocalizedString("gui.toolstation5"));
+						bonusOrLoss = bonusOrLoss.substring(0, bonusOrLoss.length() - 2);
+						toolTip.add(EnumChatFormatting.DARK_GRAY + "- " + StatCollector.translateToLocalFormatted("tictooltips.tool.crit.damage", bonusOrLoss) + textColor + StringHelper.getDamageNumberString(critDamageRange[0]) + "-" + StringHelper.getDamageString(critDamageRange[1]));
+					}
 				}
 				else if (currentAmmo.getItem() == Items.arrow)
 				{
diff --git a/java/squeek/tictooltips/helpers/StringHelper.java b/java/squeek/tictooltips/helpers/StringHelper.java
index 5b81647..63b92ba 100644
--- a/java/squeek/tictooltips/helpers/StringHelper.java
+++ b/java/squeek/tictooltips/helpers/StringHelper.java
@@ -33,11 +33,21 @@ public static String getDamageString(int attack)
 		return damageNum + heart;
 	}
 
+	public static String getDamageString(float attack)
+	{
+		return getDamageString((int) attack);
+	}
+
 	public static String getDamageNumberString(int attack)
 	{
 		return df.format(attack / 2f);
 	}
 
+	public static String getDamageNumberString(float attack)
+	{
+		return getDamageNumberString((int) attack);
+	}
+
 	public static String getShoddinessTypeString(float shoddiness)
 	{
 		return shoddiness > 0 ? StringHelper.getLocalizedString("material.stone.ability") : (shoddiness < 0 ? StringHelper.getLocalizedString("material.cactus.ability") : "");
diff --git a/java/squeek/tictooltips/helpers/ToolHelper.java b/java/squeek/tictooltips/helpers/ToolHelper.java
index 2e7fc2a..090acd6 100644
--- a/java/squeek/tictooltips/helpers/ToolHelper.java
+++ b/java/squeek/tictooltips/helpers/ToolHelper.java
@@ -9,6 +9,7 @@
 import tconstruct.library.tools.HarvestTool;
 import tconstruct.library.tools.ToolCore;
 import tconstruct.library.tools.ToolMaterial;
+import tconstruct.library.weaponry.AmmoItem;
 import tconstruct.library.weaponry.AmmoWeapon;
 import tconstruct.library.weaponry.IAmmo;
 import tconstruct.tools.TinkerTools;
@@ -152,7 +153,25 @@ public static int getRawDamage(ToolCore tool, NBTTagCompound toolTag)
 
 	public static int getDamage(ToolCore tool, NBTTagCompound toolTag, float damageModifier)
 	{
-		float attack = toolTag.getInteger("Attack") * damageModifier;
+		return (int) getPreciseDamage(tool, toolTag, damageModifier);
+	}
+
+	public static float getPreciseDamage(ToolCore tool, NBTTagCompound toolTag, float damageModifier)
+	{
+		float attack;
+		if ((Item) tool instanceof AmmoItem && toolTag.hasKey("BaseAttack"))
+		{
+			float baseAttack = toolTag.getInteger("BaseAttack");
+			float totalAttack = toolTag.getInteger("Attack");
+			attack = baseAttack * damageModifier; // damageModifier is the projectile speed here
+
+			// add quartz damage
+			attack += (totalAttack - baseAttack);
+
+			attack = Math.max(0, attack - totalAttack / 2f);
+		}
+		else
+			attack = toolTag.getInteger("Attack") * damageModifier;
 		attack += getShoddinessDamageBonus(tool, toolTag);
 		attack *= tool.getDamageModifier();
 		if (tool instanceof AmmoWeapon)
@@ -162,12 +181,29 @@ public static int getDamage(ToolCore tool, NBTTagCompound toolTag, float damageM
 		if (attack < 1)
 			attack = 1;
 
-		return (int) attack;
+		return attack;
 	}
 
 	public static int getDamage(ToolCore tool, NBTTagCompound toolTag)
 	{
-		return getDamage(tool, toolTag, 1f);
+		return (int) getPreciseDamage(tool, toolTag);
+	}
+
+	public static float getPreciseDamage(ToolCore tool, NBTTagCompound toolTag)
+	{
+		return getPreciseDamage(tool, toolTag, 1f);
+	}
+
+	public static float[] getCriticalDamageRange(ToolCore tool, NBTTagCompound toolTag, float damageModifier)
+	{
+		float attack = getPreciseDamage(tool, toolTag, damageModifier);
+
+		// the real formula (from ProjectileBase.onHitEntity):
+		// (this.rand.nextFloat()/4f + Math.min(0.75f, distance/25f)) * (damage / 2f + 2f);
+		float minCritDamage = 0.0f;
+		float maxCritDamage = (1.0f / 4f + 0.75f) * (attack / 2f + 2f);
+
+		return new float[]{minCritDamage, maxCritDamage};
 	}
 
 	public static int getSprintDamage(ToolCore tool, NBTTagCompound toolTag)
diff --git a/resources/assets/tictooltips/lang/en_US.lang b/resources/assets/tictooltips/lang/en_US.lang
index e7f6661..f21498c 100644
--- a/resources/assets/tictooltips/lang/en_US.lang
+++ b/resources/assets/tictooltips/lang/en_US.lang
@@ -23,6 +23,7 @@ tictooltips.tool.chance.to.behead=Chance to Behead:
 tictooltips.tool.modifiers=Modifiers:
 tictooltips.tool.knockback=Knockback: 
 tictooltips.tool.sprint.damage=Sprint Damage: 
+tictooltips.tool.crit.damage=Crit Damage %s: 
 
 # generic
 tictooltips.minimum=Min