Any bullet that shoots good in your gun would be suitable for Varmits. If you use it for deer I would use the Barnes X bullet, Nosler 60 grain Partition, Speer trophy bonded or the Hornady and WW 60 and 64 grain bullets. I don't know what is available for factory ammo but check Midwau USA or another good ammo supplier. Many use FMJ's to limit pelt damage if you save the pelts.