H335 is a good powder, but your loads will vary a lot between a below zero winter day and a 95 degree August day with rifle and ammo baking in the pickup while you are doing farm work. Benchmark, TAC, 8208, and other modern powders are less temperature sensitive and leave your barrel cleaner. On a SD prairie dog hunt I put 430 rounds with 8208 through a .223, then shot a few groups back home before cleaning on general principal. Groups were still tight, and cleaning was routine.
