Originally Posted by Grumulkin
I would disagree with the smaller cases part. I use H4831SC in a 300 Winchester Magnum and a 378 Weatherby Magnum with excellent results.
Though IMR 4831 and H4831SC are different powders, you will find that in many instances, where one of them is listed the other will be as well. Also, you'll find there is a fairly consistent relationship between them in regards to listed loads. That means the knowledgable handloader can, with some extrapolation, find a starting load when only one is listed for a particular cartridge.
This is just an opinion so don't take it personal.
The 300 win and 378 are not considered "Small" cases. the fact that IMR4831 is a little faster.
means that with cases that hold 50 or 60 grains of powder they may benefit from IMR 4831
Also I would never recomend "Extrapolation" of any powder from one to the next just because
they are simular. Different powders react differently to the same componants. Loading books are
to cheep and easy to find. they are allways conservative so they are a safe way to start and work
up changing only one component at a time.
Be safe, Not sorry.
J E CUSTOM