Thread: 260rem vs 6.5x55

I think I have tried every powder there is for the cal, including super performance.

Bearing in mind, my chamber is long throated so there can be a loss of pressure and velocity for equivalent powders compared to standard cut chambers.
RL-17 gives me the best speed and contrary to belief, the best ES from 120gr thru to 140gr projectiles.

I am getting a bartlien barrel to replace the Vulcan as it has had over 1000 put thru it. I was always intending to learn about the cal with the cheaper barrel and when I was satisfied I liked the cal and learned enough, as it is my first Ackley, I would upgrade.
No doubt I will get totally different results but I know roughly what to expect.