[old roper]

What little I've loaded Win cases for the 270WSM their pretty tough and hard to read pressure signs.

Accurate site list 63gr to 70gr MagPro with 150gr bullet max velocity 3136fps and Nosler list 64gr to 68gr MagPro with their 150gr Bullets max velocity 3187fps. Nosler spec barrel used.

If possible you might want to check velocity.