The 6.5 Creedmoor powder. Extreme-series, so the charge holds across temperature swings.
Description
If you load 6.5 Creedmoor, you already know why this canister is hard to keep on a shelf. H4350 sits right in the node for the cartridge, and being an Extreme-series powder it does not shift on you between a summer load workup and a cold morning hunt.