My Kimber 84L 270 loaves 55.3gr H4350/Barnes 129 LRX. (RWS cases) I've also had great results with IMR 4064, IMR 4350, H4831, R26. I never tried R17 in it as at the time I was also workign with a 300WSM and R17 was "magical" with the 168 TTSX, ha