This will vary because unlike other stat sites we include 100% of a brackets champions played and never include champions that don't belong in the bracket.
Iron Champions Analysed: 21,733,948
We include 100% of the champions played of every selected tier bracket in our analysis, we never include champions from outside the tier quoted tier.

Rammus Counters
Rammus jungle vs bottom Counters
Rammus jungle on Patch 30 is the strongest counter to bottom champions of Kalista, Tristana & Varus. While Rammus jungle is countered most by bottom champions of Swain, Kog'Maw & Yasuo. Below is a detailed breakdown of Rammus jungle counters against bottom champions with a minimum of 100 games.
Swain
the Noxian Grand General
Rammus wins against Swain 41.67% of the time which is 5.68% lower against Swain than the average opponent.
After normalising both champions win rates Rammus wins against Swain 6.51% less often than would be expected.
The average opponent winrate against Swain is 47.35%.
Kog'Maw
the Mouth of the Abyss
Rammus wins against Kog'Maw 46.64% of the time which is 2.52% lower against Kog'Maw than the average opponent.
After normalising both champions win rates Rammus wins against Kog'Maw 3.35% less often than would be expected.
The average opponent winrate against Kog'Maw is 49.16%.
Yasuo
the Unforgiven
Rammus wins against Yasuo 48.24% of the time which is 1.73% lower against Yasuo than the average opponent.
After normalising both champions win rates Rammus wins against Yasuo 2.56% less often than would be expected.
The average opponent winrate against Yasuo is 49.97%.
Vayne
the Night Hunter
Rammus wins against Vayne 48.26% of the time which is 2.03% lower against Vayne than the average opponent.
After normalising both champions win rates Rammus wins against Vayne 2.86% less often than would be expected.
The average opponent winrate against Vayne is 50.29%.
Veigar
the Tiny Master of Evil
Rammus wins against Veigar 48.62% of the time which is 0.04% lower against Veigar than the average opponent.
After normalising both champions win rates Rammus wins against Veigar 0.87% less often than would be expected.
The average opponent winrate against Veigar is 48.66%.
Ziggs
the Hexplosives Expert
Rammus wins against Ziggs 48.93% of the time which is 0.06% lower against Ziggs than the average opponent.
After normalising both champions win rates Rammus wins against Ziggs 0.89% less often than would be expected.
The average opponent winrate against Ziggs is 48.99%.
Nilah
the Joy Unbound
Rammus wins against Nilah 48.95% of the time which is 0.20% higher against Nilah than the average opponent.
After normalising both champions win rates Rammus wins against Nilah 0.63% less often than would be expected.
The average opponent winrate against Nilah is 48.75%.
Sivir
the Battle Mistress
Rammus wins against Sivir 49.10% of the time which is 0.87% lower against Sivir than the average opponent.
After normalising both champions win rates Rammus wins against Sivir 1.70% less often than would be expected.
The average opponent winrate against Sivir is 49.97%.
Smolder
the Fiery Fledgling
Rammus wins against Smolder 49.44% of the time which is 0.18% lower against Smolder than the average opponent.
After normalising both champions win rates Rammus wins against Smolder 1.01% less often than would be expected.
The average opponent winrate against Smolder is 49.62%.
Lux
the Lady of Luminosity
Rammus wins against Lux 49.68% of the time which is 1.94% lower against Lux than the average opponent.
After normalising both champions win rates Rammus wins against Lux 2.77% less often than would be expected.
The average opponent winrate against Lux is 51.62%.
Samira
the Desert Rose
Rammus wins against Samira 49.69% of the time which is 1.16% lower against Samira than the average opponent.
After normalising both champions win rates Rammus wins against Samira 1.99% less often than would be expected.
The average opponent winrate against Samira is 50.85%.
Teemo
the Swift Scout
Rammus wins against Teemo 50.00% of the time which is 0.51% higher against Teemo than the average opponent.
After normalising both champions win rates Rammus wins against Teemo 0.32% less often than would be expected.
The average opponent winrate against Teemo is 49.49%.
Kai'Sa
Daughter of the Void
Rammus wins against Kai'Sa 50.34% of the time which is 1.35% lower against Kai'Sa than the average opponent.
After normalising both champions win rates Rammus wins against Kai'Sa 2.18% less often than would be expected.
The average opponent winrate against Kai'Sa is 51.69%.
Twitch
the Plague Rat
Rammus wins against Twitch 50.63% of the time which is 0.47% lower against Twitch than the average opponent.
After normalising both champions win rates Rammus wins against Twitch 1.30% less often than would be expected.
The average opponent winrate against Twitch is 51.10%.
Corki
the Daring Bombardier
Rammus wins against Corki 50.89% of the time which is 3.38% lower against Corki than the average opponent.
After normalising both champions win rates Rammus wins against Corki 4.19% less often than would be expected.
The average opponent winrate against Corki is 54.27%.
Miss Fortune
the Bounty Hunter
Rammus wins against Miss Fortune 51.15% of the time which is 1.14% higher against Miss Fortune than the average opponent.
After normalising both champions win rates Rammus wins against Miss Fortune 0.31% more often than would be expected.
The average opponent winrate against Miss Fortune is 50.01%.
Senna
the Redeemer
Rammus wins against Senna 51.28% of the time which is 0.04% higher against Senna than the average opponent.
After normalising both champions win rates Rammus wins against Senna 0.79% less often than would be expected.
The average opponent winrate against Senna is 51.24%.
Zeri
The Spark of Zaun
Rammus wins against Zeri 51.43% of the time which is 0.62% lower against Zeri than the average opponent.
After normalising both champions win rates Rammus wins against Zeri 1.44% less often than would be expected.
The average opponent winrate against Zeri is 52.05%.
Jinx
the Loose Cannon
Rammus wins against Jinx 51.45% of the time which is 1.08% higher against Jinx than the average opponent.
After normalising both champions win rates Rammus wins against Jinx 0.25% more often than would be expected.
The average opponent winrate against Jinx is 50.37%.
Jhin
the Virtuoso
Rammus wins against Jhin 51.68% of the time which is 0.96% higher against Jhin than the average opponent.
After normalising both champions win rates Rammus wins against Jhin 0.13% more often than would be expected.
The average opponent winrate against Jhin is 50.72%.
Caitlyn
the Sheriff of Piltover
Rammus wins against Caitlyn 52.03% of the time which is 0.62% higher against Caitlyn than the average opponent.
After normalising both champions win rates Rammus wins against Caitlyn 0.21% less often than would be expected.
The average opponent winrate against Caitlyn is 51.41%.
Mel
the Soul's Reflection
Rammus wins against Mel 52.63% of the time which is 0.64% higher against Mel than the average opponent.
After normalising both champions win rates Rammus wins against Mel 0.18% less often than would be expected.
The average opponent winrate against Mel is 51.99%.
Aphelios
the Weapon of the Faithful
Rammus wins against Aphelios 52.73% of the time which is 1.97% higher against Aphelios than the average opponent.
After normalising both champions win rates Rammus wins against Aphelios 1.14% more often than would be expected.
The average opponent winrate against Aphelios is 50.76%.
Xayah
the Rebel
Rammus wins against Xayah 53.05% of the time which is 1.10% higher against Xayah than the average opponent.
After normalising both champions win rates Rammus wins against Xayah 0.28% more often than would be expected.
The average opponent winrate against Xayah is 51.95%.
Ashe
the Frost Archer
Rammus wins against Ashe 53.17% of the time which is 2.18% higher against Ashe than the average opponent.
After normalising both champions win rates Rammus wins against Ashe 1.35% more often than would be expected.
The average opponent winrate against Ashe is 50.99%.
Draven
the Glorious Executioner
Rammus wins against Draven 53.75% of the time which is 0.31% higher against Draven than the average opponent.
After normalising both champions win rates Rammus wins against Draven 0.51% less often than would be expected.
The average opponent winrate against Draven is 53.44%.
Yunara
the Unbroken Faith
Rammus wins against Yunara 53.81% of the time which is 1.69% higher against Yunara than the average opponent.
After normalising both champions win rates Rammus wins against Yunara 0.87% more often than would be expected.
The average opponent winrate against Yunara is 52.12%.
Ezreal
the Prodigal Explorer
Rammus wins against Ezreal 53.82% of the time which is 0.45% higher against Ezreal than the average opponent.
After normalising both champions win rates Rammus wins against Ezreal 0.37% less often than would be expected.
The average opponent winrate against Ezreal is 53.37%.
Lucian
the Purifier
Rammus wins against Lucian 55.44% of the time which is 2.51% higher against Lucian than the average opponent.
After normalising both champions win rates Rammus wins against Lucian 1.69% more often than would be expected.
The average opponent winrate against Lucian is 52.93%.
Varus
the Arrow of Retribution
Rammus wins against Varus 55.75% of the time which is 2.24% higher against Varus than the average opponent.
After normalising both champions win rates Rammus wins against Varus 1.42% more often than would be expected.
The average opponent winrate against Varus is 53.51%.
Tristana
the Yordle Gunner
Rammus wins against Tristana 56.39% of the time which is 3.82% higher against Tristana than the average opponent.
After normalising both champions win rates Rammus wins against Tristana 3.00% more often than would be expected.
The average opponent winrate against Tristana is 52.57%.
Kalista
the Spear of Vengeance
Rammus wins against Kalista 56.47% of the time which is 1.34% higher against Kalista than the average opponent.
After normalising both champions win rates Rammus wins against Kalista 0.54% more often than would be expected.
The average opponent winrate against Kalista is 55.13%.































