.250-3000 (Savage) brass
If anyone out there beside me has a .250-3000, standard or improved, and enjoys trying to get some brass when it's infrequently available there is a solution that's about the same price as the last WW .250 brass I saw (that was unavailable on backorder btw). Looking through the latest Hornady Manual they mention that the 6.5 Creedmoor is based on the .250 case which is not immediately obvious from comparing the case drawings. I came upon some 6.5 Creedmoor brass that with shipping was the same price as the .250 brass without shipping so ordered 100 cases.
Making .250 cases from 6.5 Creedmoor's is only slightly harder than buying .250 cases. Lube the 6.5 cases (Imperial die wax), run them into a .250 FL die, trim them to 1.902" which removes maybe 30-40 thou, and chamfer them inside and out. I uniformed the primer pockets and the flash holes, but that seemed to be wasted effort for hunting cases.
Checking case capacities to the bottom of the necks the cases formed from the 6.5 Creedmoors, and both WW and RP factory cases have close enough to the same case capacity to not cause me any worries. The .250 cases I formed from WW .22-250 cases have enough less capacity that they'll require reworking the load, and were a major pain in the tail to neck up, aside from being at least 10 thou shorter than the trim to length for the .250 (not surprising).
I use 22-250 Lapua brass.
Or for that matter, any 22-250 brass!
You can use .22-250 brass that's for sure, but it's just a lot less work using 6.5 Creedmoor cases and they are all the proper length when you're done too.