The flat base Interlocks are tougher than the Boat Tail versions, you can take that to the bank. The Hornady 154g SP out of a 7 Mag shoots holes through both shoulders of a 350 lb hog with ease. My cousin has shot the 139g Flat base on deer and hogs out of his Rem 7 Mag for over 20 years, hot load of IMR 4350, accuracy is great.
The 162g SST is a MUCH tougher bullet than most would ever think, none of that super explosive crap on this bullet. Two friends went to Africa with them loaded in a 7 STW at 3150 and they dropped 12 Plains game between them including two eland and two Kudu, all DRT.
Another tough bullet is the 150g Nosler ballistic tip. My brother did not believe me when I told him this, so it was show and tell time using quartering shots on hogs out of a 7 Mag with MV of 3150.