Regarding the OP's question as to why so little talk about 257 Roberts loads, part of the answer may be that rifle chamber dimensions vary widely. I had a tang-safety Ruger 77 made in 1976 on a long action with a very long throat. My woodchuck load used the 100 grain Speer hollow point bullet so I could get near the lands. The load was 43 grains of RL-15, which would be way too hot in my current Roberts with a short throat.
