I wouldn't call the .416 Dead. Granted there is a larger selection of bullets for .375 and the .458.

The comparison wasn't to the .375 or .458 caliber but the .416 to .411.

Midway USA list 25 different bullets available for .416

A-Square Bullets 416 Remington Magnum (416 Diameter) 400 Grain Monolithic Round Nose Solid

A-Square Bullets 416 Remington Magnum (416 Diameter) 400 Grain Dead Tough Round Nose Soft Point

A-Square Bullets 416 Remington Magnum (416 Diameter) 400 Grain Lion Load Round Nose Soft Point

A-Square Bullets 416 Rigby (416 Diameter) 400 Grain Monolithic Round Nose Solid

A-Square Bullets 416 Rigby (416 Diameter) 400 Grain Dead Tough Round Nose Soft Point

A-Square Bullets 416 Rigby (416 Diameter) 400 Grain Lion Load Round Nose Soft Point

Barnes X-Bullets 416 Caliber (416 Diameter) 300 Grain Spitzer

Barnes Triple-Shock X-Bullets 416 Caliber (416 Diameter) 350 Grain Flat Base

Barnes Banded Solid Bullets 416 Caliber (416 Diameter) 350 Grain Flat Nose

Barnes Triple-Shock X-Bullets 416 Caliber (416 Diameter) 400 Grain Flat Base

Barnes Banded Solid Bullets 416 Caliber (416 Diameter) 400 Grain Flat Nose

Hornady InterLock Bullets 416 Caliber (416 Diameter) 400 Grain Round Nose

Hornady Bullets 416 Caliber (416 Diameter) 400 Grain Full Metal Jacket

Hornady InterBond Bullets 416 Caliber (416 Diameter) 400 Grain Round Nose

Nosler Partition Bullets 416 Caliber (416 Diameter) 400 Grain Spitzer

Speer Hot-Cor Bullets 416 Caliber (416 Diameter) 350 Grain Mag-Tip

Speer Trophy Bonded Bear Claw Bullets 416 Caliber (416 Diameter) 400 Grain Jacketed Soft Point

Speer Trophy Bonded Sledgehammer Bullets 416 Caliber (416 Diameter) 400 Grain Solid

Swift A-Frame Bullets 416 Caliber (416 Diameter) 350 Grain Semi-Spitzer

Swift A-Frame Bullets 416 Caliber (416 Diameter) 400 Grain Semi-Spitzer

Woodleigh Bullets 416 Rigby (416 Diameter) 340 Grain Protected Round Point

Woodleigh Bullets 416 Remington Magnum (416 Diameter) 400 Grain Round Nose

Woodleigh Bullets 416 Rigby (416 Diameter) 410 Grain Full Metal Jacket

Woodleigh Bullets 416 Rigby (416 Diameter) 410 Grain Soft Nose

Woodleigh Bullets 416 Rigby (416 Diameter) 450 Grain Round Nose Box of 50

VS. for 5 the .411

Barnes X-Bullets 405 Winchester (411 Diameter) 300 Grain Spitzer

Hornady InterLock Bullets 405 Caliber (411 Diameter) 300 Grain Flat Nose

Hornady InterLock Bullets 405 Caliber (411 Diameter) 300 Grain Soft Point

Woodleigh Bullets 450-400 Nitro Express (411 Diameter) 400 Grain Full Metal Jacket

Woodleigh Bullets 450-400 Nitro Express (411 Diameter) 400 Grain Soft Nose

Midway listed 43 bullets in .375 and 114 in .458, 60 of which were lead. I didn't try to separate out the jacketed bullets intend for the .45/70 as they can indeed be used in any of the big .45's.