Picked up a 260 3 wks a go, haven't seen any 260 brass or reasonable priced factory loads for it either. Did buy a set of RCBS dies. I pulled 2 boxes of WW once fired 243 Winchester brass off the shelf, lube the case& necks good inside and out and size, you have instant 260's. I'd rather have the right headstamped brass but these will work (and are) until I find some new Remington or drop big bucks for Lapua. I sure didn't have to ream or turn necks either. Magnum Man