Bought a Samic Sage re-curve a year ago...loved it but overdid the draw weight @ 55lb. OK for 6 or so shots then fatigue set in. Sold the bow and then bought another (great bow btw) @ 40lbs .. no problem whatsoever after 55lb for an hour of practice. I now have a target shooting bow and a hunting bow. The penetration of layers of heavy felt cloth I use as a backstop was not far off the 55lb. I am very confident that 40lb is more than adequate for blacktail. Any real life experiences @ 40lb and bt hunting? So some vids on youtube seems to prove 40lb is very adequate. Younger days I hunted whitetails in Ont with 50 lb recurve which did the job on a larger species of deer.