I would say its in my top 3 favorite all time powders. I have shot a couple thousand 223, few hundred -06 and 243, it always has some of the best accuracy and while not the fastest it produces respectable velocities. it takes a lot of case space
a lot the ammo used to invent and develop the AR15 was loaded with 3031. it burns real clean and is the "perfect" burn rate to operate the locking and unlocking of AR15s system
It meters like crap but its tolerable , I load 3031 at 23gr with any 55gr projo for my plinking rounds when I have it. Top of the load is 24.5c so I set the powder meter for 23 and just rip them out, they vary a little cause the metering properties but never over a grain
I think 30 bucks is a little spendy, its starting to sit on the shelves here, most expensive I've seen is 27, worth it. Natchez has 8 pounds for 170 . Locally the most I have seen for 8 ponds is 200 and 180 seems to be average of the 4 places I frequent for reloading supplies