Re: Favorite 6.5 Cartridge
I voted "OTHER" for the 6.5x55. I own rifles in 6.5x55, 6.5-284, and 264WM. I love them all, but the Swede is my favorite. Lapua brass for the Swede is about half the cost of Lapua for the 6.5-284. The round itself is mild mannered, yet gives a lot of performance relative to its capacity.
All in all, I have to vote for the Swede because I think it gives the best bang for the buck among the 6.5's.
My best 6.5x55 load so far is 140g Berger VLD, Lapua brass, Federal LR primer, 48.2g H4831. I have never chronoed this load, but drops to 600 yards suggest 2750ish. From a 1/9 26" Shilen barrel, this load was shooting 3/8" three shot groups @ 100 yards. My first 5 shot group @ 600 yards in very windy conditions came in under 4".
My bigger cased 6.5's will outperform the Swede, but each of them is another step into the land of diminishing returns.