Tinker I have not used the Hydros in 7mm. I have used them in 300SAUM, 303, 35Sambar and 35Whelen and 416Rigby. The only DG I have used them on are the 416 for Buff and El and Camel. The rest I have only used on pigs, not that I would hesitate to use them on anything that walks if that is all I had, brain shots or spinal shots in the main on Ele and Buff. Yes they do work that well. Generally speaking the faster they go the better they work.

The 303 only come in 215 grain and a MV of 2200fps. Still at 60mts in one end and out the other of a 50-60kg pig. Not a big pig but I doubt you would get that result from another type of bullet at that weight and velocity. Not that I have shot a lot of game with them but the 416 went clean through a camel (Side shot), Elephants head. Recovered the one from the Cape Buff as it went in the front of the chest and stopped about 2" from the skin in the rump and this included going through bone.

One bloke I know have used the 150 out of a 300Weatherby and it passed through a 2" tree and still went clean through the pig. Range was about 50 to 60 mts. Happens when you shoot at running game in timbered areas.

I believe one of the PH in the Northern Territory now only uses Hydros in his and his guides rifles when in buff areas.

I rate them as a solid that when a soft point is the best option they are not to far behind. As a solid they are far better than the round nose solids and I am not aware of one that has not tracked straight no matter what it has hit in or out of the animal.