I tried the 2000MR with 185 TTSX. Only ran one of each to check pressures. started at 50 and went up to 53 (very compressed). Only got up to 2696FPS. I got 2730 with 48.5 TAC and the 185 TTSX (not compressed). If 2000MR is going to be really good, it must be at the higher bullet weights. I'm going to stick with TAC for the 185. I also ran the 180 BTs with TAC. 49gn was 2826 and was starting to show signs of pressure. Although, it was 95 degrees out. Probably stick with 48.5 (2792). Will shoot for groups next timeout with the 180 BTs.