I found a hen's tooth recently in a LGS. A new in the box Remington 673 that was lost in the back room for 15 years. The only kink was it's chambered in the one caliber I'm not set up to load for. .300 SAUM So I found some dies, picked up a little once fired brass and have a few boxes of Hornady 150gr and a couple of cans of Hornady Superformance powder. Has anyone used Superformance powder in their 300 SAUM? I have a few cans of other powders as well but since powder is becoming scarce I would love to use what I have.
Thanks
