My Ruger 77 Mk 2's in 7 x 57 both had long throats.

I just seated the bullets to magazine length.

both were picky on loads, but 40 grains of IMR 3031 with ANY bullet weight, turned out to be 1/2 inch loads...

anything else could give groups of 3 to 5 inches at 100 yds.

"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