las,
With my present batches of H4350 and IMR4451, the 4451 is slightly faster-burning, but not much. In my 7x57 I use 46.0 grains of H4350 with 160-grain bullets, and with 4451 get the same results with 45.5. Have had similar results in other rounds, so they're pretty close--close enough that some lots may get exactly the same results, or H4350 might be slightly faster burning than 4451.
Alright, John. How about a new list of your favorite 4451 recipes for the old 7x57. Inquiring minds, you know.
By the way, I've been goofing around with Hunter and 160-grain Partitions, but have some data for Big Game in loads from 100- to 175-grains. I'm planning to work up some loads using 154-gr SP at around 2600+/- to use on pigs and our dinky deer. The Ramshot powders seem to be more available than just about anything else right now.
