AP: First time running the game

More quick questions:

Volley: On a 10+, do you mark off ammo? Or is that only when you choose to on a 7-9?

Experience: How much XP should a player roughly expect to get after a 2-hour play session. My group last night were nuts lucky with rolls and even after end-of-session XP thingers they have only 2-3 points each.

Volley: The latter is true. Ammo are counted by abstract means. You can see that a player with a ranged weapon usually starts the game with 3-6 ammo, which would be ridiculous otherwise.

XP: The luckier you are, the less experience you need! :D 2-3 xps are ok for the first session, then usually players understand how to get more xps by the end of the session and:
1) become more reckless on rolling with a low stat;
2) actively try to bring into play one or more bonds and their alignment;
3) actively seek treasures, big baddies and interesting facts on the setting.

Those things obviously give a lot of fuel to the fiction, so trying to gain more xp actually pays out improving the story!

Cheers, appreciate it.