If I were doing one I'd go with the 6.5mm version. Way more good quality long range bullets available in that size, and otherwise very similar. I think Berger just started making VLD bullets in 25 cal, but I don't know of any other makers. Everybody makes sleek 6.5 bullets. And as the other poster said, go with the longest barrel you can get your hands on. Recently I've been using Brux palma barrels for several rifles and have been very impressed with them. Quick turnaround, reasonable price, and super accurate. I used to be strictly a Kreiger fan, but they are only 28" long and for something like this you want all you can get. Build it as a single shot, throated to put the base of the bearing surface at the neck/shoulder junction. Feed it something that burns about as fast as shredded newspaper, like that new US86 powder from Hodgdon, and use a good 140gr. or so match bullet. You'll be amazed at how flat it is way on out there, 1000 yds plus.
