if ya got one that doesn't shoot much of anything real well, there is only ONE perfect load for a 7 x 57...
Like a Ruger 77 for instance.

40 grains of 3031.. pick any bullet weight you want from 120 to 175 grainers...

"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC

“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez