I am hunting black bear this fall and am wondering if the Rocket Ultimate Steel 100 would be an effective broadhead for bear. I have been told by a few people that the cutting diameter (7/8") is not enough for a good blood trail and a quick clean kill and that I should stick with the thunderhead 100. I am just having a little trouble shooting them in a consistant group. I am shooting a 28" terminator hunter arrow at 58 lbs and 226 fps. Any help would be great.