Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
So you want to know how to jungle with Rammus?
First you you buy the Cloth Armor and 4 Health Potions. Then you skill on "W" and go to the blue buff. Let the guy solo laning defend you at start. When the buff spawns he should go away so you get your lvl up. Now let's start.
You hit one of the little guys. Then you use your "W" spell. After one or two hits from the buff you activate your first Health Potion. Kill the little guys. Use Smite. When you got the buff you become lvl 2 skill on "Q". On your way to the wolfs use your second pot. press "Q" in the wolfs then "W" 'til theyre dead. Now to the ghosts. Go between them and use "Q" (and 3rd pot). Then "W" and attack the big one. the other will get enough dmg by "W" for getting 1hit. Now go to the Red buff and wait for cooldown of smite and use your 4th potion. The red buff should have 1800hp now.
It's always pretty close to get him. Always less then 100hp. If someone ganks you there you're dead. nvm, use "Q" then "W" and kill the little guys. Now "W" and attack the buff. When it ended "Q" again and "W" again.
If you played well you did it. Go back and wait for Ninja-Tabi (ca. 20g needed).
Now it's time to gank bot if necessary.
Then go on jungle 'til you're lvl 6. Then you go get your blue buff again, go back and gank top lane where your mate waits.
Now do what you want and don't be sad if you dont get any kills, cause you're a >Tank<.
And Tanks are supporting. ._.
GL & HF