Re: WC872 powder question
I use WC872 as the powder for most of my varmint hunting loads. Great powder and it seems to be easy on barrels.
Like Wambo said, it will give you an occasional flier, so it's probably not the best thing to take to a match ( Unless you are shooting against me )
If you are shooting a 300 RUM, you might give Retumbo and H50BMG a try. Both have worked well for me.
If I can kill that coyote from here, Will you walk out to get him?