Used them this year on elk hunt shot a big bull, 2 bad shots (hit bulky coat sleeve) still recovered elk. First shot hit paunch area angling back went thru off side back leg completly till the tip just cut thru hide. Cutting tip still sharp enough to slice open hide.Heres picture of entry hole:
Second shot again hits sleeve hits elk in shoulder blade. Broadhead penetrates blade and lodges in same.Recover broadhead when deboning, find head thru thickest part of shoulderblade other than the bone ridge. Point of head is sticking out ofblade 1/2" to 3/4", cutting point is curled back. Have to drive head backwards out ofblade to remove. The head is ruined because the side force of going thru bone breaks the sides of ferrule that enclose blades.
May not sound very durable, but if you would have seen the cirumstances I think you would be impressed as I am.