Originally Posted by geargrinder
Only downside to the RSAUM is the smaller case capacity and lack of brass manufacturers. But, easily a step up from 308.
Not as small as one might think; don't go by its case volume'.., it's a great design. I shot one for quite a few years as a 1k rifle. Using Sierra's 190gr Mk, well; it will do all that's needed, pushing it to 3100 fps from a 28/30 inch barrel'...., without all the powder and the accuracy of a good target/tactical .308 Win. And if you just happen to be an auto loader guy, it works very well in the gas guns; as does the .308 Win/7.62x51 Nato
By the way you can go to Midway and buy brass today 500 count and more for it. I don't think finding brass is not going to be a problem for it right away.
If you’re shooting a.30 cal'..., and like the caliber, this one and it's little brother; the 7mm RSAUM are two cartridges worth a second look.