The 6.5 Grendel is very versatile depending on job at hand. If going after varmints 85 grain Sierra Varmint, 90 grain Speer TNT, 95 grain V-Max. For bigger animals like cyotoes and wolves the 100 grain Sierra varmint and the 100 grain Nosler hunting ballistic tips. For deer, antelope and hogs any of the cup and core 120-123 grain bullets are effective. The Hornady SST and A-Max have .510 G-1 BC and not far behind are the 120 grain Nosler Ballistic Tip Hunting bullet. For shorter range the 120 grain Sierra Pro Hunter holds together pretty good. For bigger game there is the 100 grain and 125 grain Nosler Partitions, 100 grain Barnes TTX, TTSX and Barnes 120 grain TSX, TTSX and Hornady GMX. Nosler also has the E-Tip and 139 ABLR (accu bond long range) which is supposed to expand down to 1300 FPS. Burger also sells a 130 grain VLD hunting bullet.
Use bfoosh06 link but the 6.5 Grendel can be used for a variety of task if you reload or need factory Ammo. Hornady sells factory 123 grain SST & A-MAX, Federal sells the 120 grain SMK American Eagle, Prvi Partizan sells the 120 grain HP BT and 110 grain FMJ, Wolf sells the 120 grain MPT (Multi Purpose Tactical) loaded by PPU, plus Wolf sells the steel cased 100 grain FMJ loaded by Branual. Alexander Arms and Precision Firearms also sell hunting and target ammunition. Lapua, Norma/Nosler, Hornady, and PPU sell virgin brass.
Check out this youtube channel for real world hunting experience with the 6.5 Grendel.
https://m.youtube.com/watch?feature=youtu.be&v=RoLuYE1n4pU