The initial limbs used on ILF type bows (originally WARF bows which evolved into DAS and then.......) were olympic style target limbs. Usually made with carbon and synthetic cores which were engineered to withstand extremes in weather conditions and to take the abuse of shooting very lightweight arrows thousands of times. Limb reliability and performance were the best in the world....no problem in a hunting environment of any kind. In addition the original limbs I had on my bow, as many Olympic limbs are, were made to decrease in the amount of weigh being pulled at full draw...the weight still built up but instead of, say, 4#/inch, they were 2#/inch at the end. This was because target archers used clickers and drew thru the clickers slowly at the end of their draw. These high performance limbs were remarkably smooth, extremely stable and durable. I've been shooting my DAS for about six years and it has accounted for a moose, 3 bear, about 9 or 10 deer and 3 turkeys. They have been thru every type of hunting situation in terms of heat, cold and humidity and I have had no failures of any kind with the limbs, riser, strings, rest or plunger. In fact, I have not missed a shot at a big game animal since I got the bow. As for the weight of the metal riser, I don't like to use a bow quiver so the little bit of extra weight, about the same as a 3 piece BW, adds stability and absolutely no hand shock to be had. Tunability is limitless if you like to tinker. And, for guys like Walter Mauney, the preload aspects of the bows lend themselves very well to bowhunters who have short draws. low weights or both and want superior performance.