Overmatch
Caliber Overmatch Rule (3× Rule)
When shell caliber is ≥3× armor thickness, ricochets become impossible and angle modifiers are reduced.
What it means
Overmatch is a 'thick gun beats thin armor' rule. If your shell's caliber is at least 3 times the thickness of the armor plate it hits, two things happen: (1) ricochets are impossible regardless of impact angle, and (2) the angle's effective armor multiplier is reduced. This single mechanic explains why huge-caliber derp guns can punch through angled light tanks and SPG roofs that should statistically deflect them.
How it's calculated
Typical values
Common overmatch breakpoints: 122mm shell overmatches up to 40mm armor; 152mm/155mm shells overmatch up to 50mm armor; 100mm/105mm shells overmatch up to 33mm armor.
Example
Why it matters
Overmatch shapes top-tier brawls. Heavies with 30mm roofs cannot 'angle' against 152mm derp guns — they must avoid the line of fire entirely. Conversely, big-caliber guns can ignore the slope of light-tank top plates and farm them through normally-impenetrable angles.
Common pitfall
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Related terms
- Ricochet — When a shell deflects off armor instead of penetrating — typically at impact angles over 70° from the perpendicular.
- Armor angling — Tilting your armor to multiply its effective thickness against enemy shells.
- Normalization — How much a shell's impact angle is 'corrected' toward perpendicular when striking sloped armor — making penetration easier than pure geometry suggests.
- Penetration — How many millimeters of armor your shell can punch through at point-blank range.