Here's a picture of 5 of my 416 calibre cast bullets.
On the left is a 290 grain GC NEI bullet, next is a 340 grain LBT bullet, the third one is a 350 grain RCBS bullet, fourth one is a 410 grain NEI bullet and the fifth is a 445 grain CBE bullet.
I have tried all of these in both my 416 Taylor, and my 416 Ruger. My wife shoots the 416 Ruger and the LBT bullet loaded with 23.5 grain of Trail Boss, they do around 1400 fps and with the open sights, shoot groups about 1.25" at 50 yards.

Regards,
David