I have recently taken ownership of a 1974 built Rigby 275 and am load data to work up a nice flat shooting load. In effect to replicate the original "Rigby 275" load of 140gn bullet at 2,800 fps.
I have available imr 4831 or 4350.
And if anybody has a set of dies for 7x57 pls let me know before I go and buy new.
Thanks in advance.