My 257 Roberts experience is positive but very limited, shot one doe at 200 yards with a 100 gr TTSX going 3150 fps using H-4350 in an old Ruger ultra light 257R, she was facing me downhill, the bullet center punched her neck and exited, re-entered her back at the ham area, exited again under her tail, obviously DRT.
Shot another doe and very nice 9pt buck with my new Montana 257R last fall, this load features the 100 gr TTSX powered to a full 3265 fps with Hodgdon's Hybrid 100 powder, the doe was on a hard quartering away shot at 40 yards, entered at last rib and exited off shoulder, DRT, the buck was broadsided at about 210 yards, center punched both shoulders, complete penetration, DRT.
I have always thought about the 120 gr Partitions in my Roberts, but damn, these TTSX's will be hard to leave.
