I won't use them anymore, he's why: 180 grain SST loaded to moderate 308 velocity. Close range shot taken at about 20-30 yards, bullet separated and fragmented. Shot was perfect right behind front shoulder on a 5 point buck, didn't hit any bone on the way in yet still fragmented. A large portion of the bullet exited through the top of the deers neck, while the largest fragment exited the opposite side of the deer. 25% of the heart was destroyed, and the lungs were gone. Front quarter on entrance side looked like it was hit by a freightliner. At moderate .308 velocities, and without striking bone, only flesh and organs this bullet did not hold up.
I digress... Same type of scenario only with .303 Brit. Loaded mod velocities, very close range again 20-30 yards. Was using 180 grain hornady interlocks. Bullet didn not frag, stayed together and retained most of its weight.
Know what type of hunting you will be doing, and know what type of ranges you will be engaging at. For the type of hunting I do, close range shots often present themselves. If your hunting the prairies, the SST might be a viable choice for you.