RE: 260 Rem. or 6.5 x 55 mm
the 6.5 swede all the way. CZ makes one with a 24 inch barrel and Ruger has one with a 22 inch barrel. The 6.5 round works better with the longer barrel. The reason I say this is I have 7 6.5 swede mauser model 96 they are over 100 years old and will out shoot most new guns made today.
just my 2 cents