I have used Shooter with good success for ELR with my Terrapin, but mostly load modeling, but I prefer my Ballistic RF's for LR hunting. I switched to AB about a couple of years ago when they had finally worked the bugs out of the iOS version. Out to 1300 yards, ballistic outputs are identical between the two. While I think neither is all that great in this respect, I prefer the screen and user interface of the AB.