Per Talley, "This mount will fit Model 70 Post-64 magnum length actions such as a .300 H&H & .375 H&H. .330″ is the hole spacing on the rear bridge. Please check rear hole spacing on your rifle before ordering." If your receiver does not match the fit notes listed by Talley, please email us at techsales@opticsplanet.com and we can go over other recommendations for your Model 70.