FYI: I was having trouble getting the velocity I wanted for my 300 grain TSX with RL15. I achieved outstanding accuracy at 2475fps, but I was only reaching 2525ish fps with poor groups at that speed. A friend told me to try RL17. I did it today and am pleased with the results. I'm settling on 80 grains at an average velocity of 2623fps. This gave me a .733" four shot group at 100 yards. It was a poor day for shooting groups and quite frankly I think I can do better (not that I need to). I went up to as high as 81 grains with an average velocity of 2726fps. Just thought I'd let everyone know.

Brett