My only experience with them has been with the big bore dangerous game rifles. Their performance for this purpose, IMO, is second to none. Shown is a ,458 caliber, 480gr Woodleigh SP hand load at 2150 FPS from a 450 Nitro Express. It entered from the front chest of an an African Lion I shot at 21 yards and was recovered at 90% weight retention under the hide of its rear end. Interestingly, the bullet shape/ogive of the Woodleigh matched the old Kynocks shape, enabling them to shoot accurately and to the regulation in my 1904 H&H Express Double Rifle. The modern 500gr bullets(Hornady, etc) would not shoot well on my rifle. Federal used to offer(and may still), Premium Ammo in 416 Rigby loaded with 400gr Woodleigh SP. They were exceptionally accurate in my Ruger Safari Grade with sub .5MOA 3 shot groups.
View attachment 121053