He was talking about accuracy and those velocities are a good starting point . With rifles with a larger groove dia , too much velocity will start to hurt accuracy . I said a good velocity for the 170 was about 2500 , which you said was too slow , yet you like a 175 at 2490 ? Also 1905 is not a correct date for the S round [ and the S bullet was not .323 dia like what he is using ] and neither in 1933 for the 198 sS round .