nicholasjohn
Well-Known Member
IMR4350 vs H4350, it matters because they have different burn rates.
Yes, they do - and one is more temperature-sensitive than the other as well. The H-4350 has a burn rate that is closer to IMR 4831 than it is to IMR 4350. This is hair-splitting, but when one gets up there near max pressure, it never hurts to split the hairs.