I used the 100 gr ultimate steel for the first time this year for an elk hunt with good success. I settled on this broadhead mainly for two reasons- it flies like my field points and it has great penetration ability should one hit bone. I took a very large mature bull Aug 27th. The arrow entered in front of the front leg about a third of the body height from the bottom. I'm not sure if it hit any leg bone. It did a complete pass through coming out behind the front leg on the back side. The arrow, fully covered with blood, was found intact in good condition. The bull went about 80 yds and dropped. Since I didn't need to follow a blood trail to find him, I wasn't looking for one, but I did notice considerable blood the last 30 yds before I got to where he died and he was laying in a large pool of blood. My feeling is that if the wildlife departments say a 7/8 in blade is legal then it should be an adequate size to do the job. It stands to reason there is a better chance of getting an improved blood trail with a larger blade, but, as in all applications, one has to trade off the downside of a larger blade, such as effect on accuracy in side winds, bone penetration and other. So know your abilities and pick your own priorities. I don't have enough archery kills nor have I found good research articles to know how much better a blood trail might have be with a larger blade-it depends, also, on where the arrow hits and it's angle. Based on this sample of one very good experience, next year ( it's going to be hard to wait) I will be using the same broadhead for deer and elk.