I killed 2 deer with them this year . Both fell within my sight . first year for that . they fly great out of my setup 4" heilical feathers . sheild feathers . shooting around 265 fps 420 grain arrow 68 lbs 28" draw useing a 25" arrow because of the built in overdraw on my muzzy zerro effect rest useing 2312's . these are the same thing as nugent blades . pass through every time which is a bonus , 2 holes in an animal is always better than one that has an arrow in it stoping the blood trail