All depends on your chamber. My 6.5 creed loads are 2.810″, and just barely fits the t3 magazine.

There might be an easy mod to let you seat bullets as long as you would like.  Since I believe the super varmint uses the standard T3 mags, all you would need to do is replace the short action bolt stop with the long action one.(or modify your existing bolt stop-easy) and get a 30-06 magazine.  I have not tried this personally, but it should work.

Let us know if you go this rout and how it works for you.

Good luck!
-Eric

I have tried this with a 300 wsm the problem with the wsm is the case is to wide and gets stuck in the long action mag and therefore does not feed otherwise it would work.

The 300 WSM has a larger Diameter than the 30-06 family of cartridges.  The .260 rem is a .308 necked down and a 308 is a short 30-06.  Hope it works!

I will be getting a 260 in a few days, and the mod EricB7 gave will be used if my loaded round turns out to be too long for the original mag.