IMHO, a Sako will out the box outshoot Rem's and Kimber's. In 260, the throat of my 75 is fine with 140s, but right now it's on a steady diet of 130 ABs and it shot a few groups where the FIRST 2 went into the SAME hole at 200 yds. Never had a Rem do that, nor would expect a Kimber.
That said the other brands will do, but if you want the MOST accurate.....Sako GUARANTEES their accuracy, Rem and Kimber does not.
Lastly, bbl length, I thought they were like 22 5/16? None the less, IME w/6.5x55 (and 260 will mirror), 2" of bbl w/equate to 60-75 fps if that, and one would never notice the difference on game if you place your shot into the vitals IMO.
If you handload and shoot nothing heavier than 142s, get the 260 FWIW. Today's bullets in 120-140gr are better than ever and will kill as well as any 6.5mm. OTOH, if you want Nostalgia, go with 6.5x55 and load or buy 156-160 grain.
Either 6.5mm round is good medicine IMO on non dangerous (IE Bears) game in NA if shot is placed up to 400 yds or so.
