This intrigued me a bit. I shoot a Tikka T3 Lite SS in 6.5 x 55 SE. The barrel is 570 mm or 22.441" long. I use 48.3 gr Vihtavuori N560 powder, Norma or Lapua cases, 140 gr Hornady SSTs, a COAL of 3.150", and I am getting a chronographed 2771 fps on average. It may be possible to get it up to 2900 fps,but that would be pushing the upper limits for me. I am going to be re-visiting the 140 gr loading with a 140 gr Woodleigh PPRN, sometime in the near future. Another load that I have hunted with, with great success, is using the Woodleigh 160 gr PPRN, Norma or Lapua brass, 46.5 gr VV N560, COAL of 3.030" for 2647 fps chronographed. Yes, I am pushing into the 60 K PSI range, but I do have a modern action too. So, to the OP, I believe the load you are using, if it is accurate, keep it. I have never seen anything kill like a good hunting bullet in a 6.5 x 55, and shot placed correctly. There is simply, just no tracking involved. That's why I have nicknamed it the "pop 'n drop" cartridge!