6.5 Grendel

H4198, H322, IMR8208, Benchmark, H335; and similar.
Check out Accurate and Alliant powder web sites for additional choices.

I have been loading mostly 335 and Leverevolution

8208 is the only one you need.

I've settled on 8208

For what it's worth here's Nosler's opinion, https://load-data.nosler.com/load-data/65-grendel/ I have found their data pretty spot on.

8208, cfe223, and w748 were what i used.
I settled on a heavy charge of cfe223 as it didnt give up any accuracy, and produced top velocity in my rifle.

Reading my Hornady manual it appears that many of the powders tested and listed for .223/5.56 will work for your Grendel.

I try to stick with one powder that works well with more than one cartridge, eliminating having a shelf full of different powders. Presently I have only 3 different powders for two rifle cartridges, four pistols cartridges and one shotgun gauge.

I've got to agree with a few posts above if your Grendel won't shoot a 120/123 bullet pushed by IMR 8208 you have a tomato stake for a barrel.

AR Comp here.