Mine, a #1 A, in 7x57 Mauser, liked 42.0gr. IMR4320 with 140gr. Partitions - 2,940fps - bit higher than the books show for that load. Some books do not go that high, but it is a book maximum and no pressure signs at all.

Sub 1" @ 100 meters.

7x57's make great #1's- just wanted a #1S (26"), not a #1A.