Re: 6.5 Bullet Recomendations
Your rifle with the 1-8" twist will stabilize any thing out there so what it will shoot isn't the question so much as what velocity and what bullets construction type you would like or think you would need.
At 300yds BC doesn't factor so much and the velocitys that a .260 Remington is capable of you may want a bullet that will readily expand if you are keeping it to deer.
There is a way to have you cake and eat it to with a 6.5mm bullet. A 129g Hornady SST is the bullet that fit's this bill, giving you velocity capability with a G1 BC of .485 is a really good option and will allow you to stretch the range out even further let's say 500-600yds. What's even cooler is that the 129g Hornady Interbond is identical in every way minus cannalure of the SST and the fact that it's a bonded bullet, It has the same BC... So if you wanted to hunt heavier game you could switch to the Interbonds and practice with the SST to save cash.
I actually am using both in my 6.5-06 AI (1-9" twist BBL) and I'm getting 3300fps. this is actually my accuracy load. I could push it faster, but why?This is my aproach to the same question. however I am limited because of BBL twist. I wanted to use 140g Bergers and 140g Sierra Gamekings, but I couldn't push them fast enough to overcome the slower twist. I knew going into this build that I could have this problem and I fought it for a full year before I fealized that a 130g or less was the solution.
Hope this is helpful,