IMR 4831 is a slow burning magnum rifle powder, useful in any number of cartridges, most notably, the 7mm Remington Magnum. It's an extruded stick powder with various coatings that limit burn speed.
It's also notoriously hard to meter, that is, if you put it in a powder measure, it'll bridge and the handloader will get varying charges. Still, it's such a good powder for some uses that handloaders are willing to overlook the problems working with it. As it turns out, IMR 4831 turns in excellent accuracy in my son's Savage 111. He doesn't shoot it much, but every so often I load a box of ammo for his rifle. About fifty rounds per every six months or so keeps him in ammo.
Each of these rounds is assembled as carefully as I know how to assemble ammunition. The new brass was properly prepped (trimmed, camfered), then the primers seated. Powder weighed painstakingly, double-checked and the Nosler bullets seated to a length that puts them 0.010 from the lands of his rifle. This should be very accurate ammo. I've used every trick I know.
Hey, Matt! Your ammo is ready.