IWBB Level One, one plywood board and one waterbucket per compartment:

[Linked Image]

IWBB Level Two, two plywood boards and one waterbucket per compartment.
10 compartments, each compartment 10" thick, 100" long from head to rump.
4 inches thickness of extra plywood is the tail on the Iron WaterBoard Buffalo.

The Level One is for the 550-gr paper-patched 20:1 alloy FN at 1400 fps from the .458 WM-BPCR,
and the 400-gr XTSX at +2500 fps from the .458 WM+,
and the 450-gr TSX at +2400 fps from the .458 WM+.

The Level Two is for the 480-gr XTSX and 480-gr HYDRO and 500-gr TBSS at +2300 fps from the .458 WM+.

GUY ON A BUFFALO: https://www.youtube.com/watch?v=iJ4T9CQA0UM

Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.