Even without the olive branch--whether the offer of helping with the standard ammo had been meant as such or not--Irahl's ruffled feathers smooth out quickly once he can tell that they hadn't meant anything by their earlier question. If he is still holding any of that anxiety or suspicion, it doesn't show, and that's what matters. So, he might have a couple of nerves that are easy to hit, but it looks like he doesn't hold grudges where it isn't warranted.

"All yours," he replies. "Take a couple if it will speed things up."

He assumes (or at least hopes) that they're going to dismantle the round in order to get everything perfect, and he figures that keeping a whole, untouched one on hand as well will help.