Re: AR10 type rifle in 260 Remington?
Not sure what "reliable loads" means.
I run a 6.5Creed, which is pretty close for load data, out of an AR-10.
I match the factory Hornady loading, 42.5gr H4350, 210 primer, 140gr AMAX and it runs good.
260s tend to run another 0.5-1gr so if you...