Splash
Interesting, have you ordered a factory rifle and therefore a standard dimensioned chamber or a 'custom' job ? Factory ammuntion is available I think, but very limited in bullet type and weights. The 260 is really a reloaders calibre in UK if you want to get the best from it , thats MHO at least.
The thread that BB refers to involved my self and the semi custom Tikka 595 shown there.
Martyn is one of the better sources of info on the round, and he certainly puts more thru his collection than I do, so you might ask him for load info.
Anyway, a warm welcome to the 260 Owners Club.
ATB
T260