Well our bear population is getting a little much here, and while i don't have problem a popping cats with the old .223 in heavy brush, it might be better to have a little heavier round for those nose to nose bear encounters that are happening here. So basically i have been looking at 6.8 uppers to throw on one of my brush ar's. I will be using it out to probably 300yds from time to time as well. I simply wonder if anybody here is using one, and how you like it. blue