Re: 20" barrel 260 Remington Need help!
I have a 26" barreled 6.5 Swede with a 9 twist that shoots 140g Berger VLD's VERY accurately. Your 8.6 twist should be just fine.
An old timer on another board once told me that he believed the 6.5's gave better accuracy with lower muzzle exit pressures. That is why he recommended a 26" barrel even with the smaller cased 6.5's. I don't know if that is true, but I thought I would throw that out there as food for thought.
One thing to consider is that the problem may not be your existing load per se. Before completely re-working your load, try the Berger Seating Depth test in your other rifle. It may simply be that the other rifle prefers a different COAL.
If you have to change bullets, I have found the Nosler Partitions to be very forgiving. I have used the 140g version. I have also heard good things about the 125's.
Last edited by benchracer; 08-25-2013 at 02:35 AM.
Reason: Have a 26" barrel, not 26'