On her turn, Expatriette had no "Start of play actions"
Expatriette played Unload in her play phase. She now has two powers.
She chose to use Pride's power to deal 1 target 2 damage and use Prejudice's power to deal 1 target 2 damage.
She still had one more power.
We ruled that she could NOT then use Prejudice's power. The argument was that she used Pride's Power as activated both guns, did that count as using Prejudice's power, since she didn't actually spend one of her 'Power' actions.
Expatriette then played a card from her hand and ended her turn.
Would folks agree that we ruled this one correctly?
You would also need to use your first power to play a card, since you would of used two powers when using Pride and Prejudice. Much like when Mr. Fixer has another power (probably a Treasure in Tomb of Anubis) and plays a Overdrive. he would first use the Treasure he has and then follow with the double strike, as if he would of used a strike first it would of counted to using a power.
Since Expatriette has two guns in play, Unload allows her to use two powers.
Pride says "POWER: Expatriette deals 1 target 2 projectile damage. If "Prejudice" is in play, you may use its power."
So, if Expatriette first uses Pride and then uses Prejudice, then she has satisfied both Unload (use two powers) and Pride (use Prejudice's power), and has no more powers left that she can use, so doesn't get to user her base power to play another card.
If, however, Expatriette first uses her base power to play a card, then when she uses Pride and it says she may use Prejudice, there's nothing stopping her from doing so, even though it is her third power.
To be precise, it's once per turn, not once per round. If you have an abilty that lets another hero activate a power on your turn (e.g. Argent Adept or an incapacitated power) they can activate a power that they already activaed on their turn.