BTW this comment also relied on personal conversations, where some knowledgeable persons have made comments in talks, ie a Woodleigh weld core or FMJ, are still better. One person said they would not say it publicly though to not upset ...

A hydro s a good compromise between the two though. And one only has to chamber one form of projectile.

As said by one member, they used it on elephant. So if it works it works.

I used a FMJ and it worked well too. Even exited a COW elephant skull. I wonder on a bull?

Back to the .416 Rigby No. 2. I also wonder if the rifle needs to be regulated for a hydro vs say normal weld core/fmj projectiles? They must have somewhat different reactions while travelling in the barrel. Enough to matter or not?

If regulation IS different, one would want one's rifle regulated for the chosen ammo. I am guessing from images, the Rigby ammo caters for the hydro. Makes some sense as that ammo can be used where lead is banned. The added price of a hydro bullet won't matter to a 120,000 pound rifle buyer either.

Lesser barrel wear due to the driving bands as well. The rifle will last "forever"!

Have I said, I want one! A dozen times?

Forget to enter lotto on the weekend.