H4350, no. Alliant Power Pro Varmint, yes: https://reloadingdata.speer.com/down...ld_Dot_120.pdf.
When you look at load data for 6.5 Grendel, all the powders being used are faster burning than H4350. You can use load data like this to give yourself an idea as to which powders will work and which ones aren't suitable for a cartridge.
I've shot heaps of critters with the 90gr TNT's in my Grendel and they've been great. Drive them fast and they're deadly.
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