On the .416 Taylor ... you can use the 350 gr Speer MagTip with reduced velocities for hunting in North America. Works well if you don't push it much past 2200 fps.

Cast bullets work well in the smaller .416s. I wouldn't bother in a Rigby, Ruger or Rem Mag, but do use them in a .416 Aagard and they work fine.

Aagard is a .376 Steyr opened up and improved. Nice for standard length actions. I have a CZ 550 Safari Mag in .416 Rigby, a .458 AccRel, and a .470 NE double rifle so didn't to build yet another Elephant killer.

I do use a 400 gr NEI cast bullet in the Aagard ... at it shoots clover leaves pretty regularly at 100 yards. I use AA5744 as the propellant.