6.5-284 never did it for me, SA caliber that needs a LA to do what it claims.
Have a gaggle of 260s... they're the every day workhorse from a true SA.
Also pretty well acquainted with the 264, have had several, only have 1 right now... but have to admit with less than a 26 or 28 tube a 6.5-06 crowds it pretty hard with less powder.
Recently built a 6.5-300 RCM. True short action, feeds like butter, case designed for 65ksi, capacity trumps the 06, Rem mag, and 284 by 4 grains or so. If one has to ask why, for a Ruger and 6.5 slut it was a natural progression. Logic need not apply...
