Bonegrinder Giants are subject to the Fall Over rules of normal Giants, but use the large template and causes Strength 8 Hits with the Multiple Wounds (D6) special rule.
Source: Warhammer Armies Project: Unofficial 9th Edition
Bonegrinder Giants are subject to the Fall Over rules of normal Giants, but use the large template and causes Strength 8 Hits with the Multiple Wounds (D6) special rule.