Might check out David Tubbs' 6mm XC. I believe it will fit in a short action, but don't quote me on that. He shoots 115 grn bullets at around 3000'/sec. and, it's his 1000 yd competition cartride.
I just had an Ackley improved 6X47 Lapua built (6 Long Dasher). It will fit a short action for sure, and I got 3300'/sec with a 105 in a 26" tube. That wasn't the max load, but 1.5 grains under max. The 6 XC is about 2grns H2O capacity over the Long Dasher.
Better BC's than most 22 cal's or even the 25 cal's and getting the same velocity as a 25-06 with alot less powder!