I've been casting 25 cal bullets for years but only had a .258 lube sizer as a choice. I use the ideal 257388 & lyman 257464 for my 250 savage rifles. Both are .260 from the mold. I now see that buffaloarms has custom sizing dies, one that is .259 and another that is .260.

I'm tempted to get the .259, this would match the conventional wisdom of going .002 over .257 and only slightly reduce the diameter of the as cast by .001. Or would it be better to get the .260 and basically just lube the bullet using the sizer?