Test-shooting the .22 CB Long into about 2 cm of a bonded-wood board (comprised of 9 medium-grain boards ranging from 2-4 mm in thickness, glued together). No intial penetration of the total board, but if the same 4mm surface area was hit twice by CB Long shots, the back of the board splintered apart and penetration of the total board was present.
Boring specifics: Remington 512 Scoremaster rifle, CCI .22 CB Longs, distance of 15 feet...