I centered the shoulder blade on a doe last year and didn't get but about 3" of penetration, so no recovery. I've hit 3 or 4 in the same spot with a fixed head in the past with the same results. There's one spot on that shoulder you will not send a broadhead through, I don't care what anyone says. I've killed a many of them by hitting them in the shoulder, but I didn't hit that spot. All of my kills were center lung or heart shots except for one. The 8pt I killed last year was with a neck shot, on purpose, and he was DRT. The only other deer I hit and didn't recover with the Killzone was an old 9pt last year. I grazed him across the top of his back.