What kind of ammo for the savage 300 lever action model 99E?

.300 Savage. This ammo is getting harder to find. You used to have a choice of 150 or 180 grain bullets. The last few years I have only seen the 150 grain offered. If you want to buy online I know Able Ammo does carry .300 Savage. It's a good caliber. I have taken several deer with the same rifle you have.