I've used the BDX system and I find it very fast to use. For a hunting rifle, it's very efficient. Just range and the dot lights up, I really can't imagine anything being faster for hunting. I have had it on my son's rifle for several years, used it in a few precision rifle courses that were geared towards hunting, and it was really effective, especially evident in one case where he had a shot at 600, and then very quickly, another follow-up at 270. Using the system, the switch over was as fast and efficient as it could be.
In terms of connection, Sig has done a really good job in making that connection stable. I can't remember but once or twice where it did not immediately pick up, and when it did that, we just re-ranged and it was GTG.
Though it is really setup for hunters, we were able to ring steel out to nearly 1k with it with my son's rifle, but that's not its design goal, and at least on his rifle, we could not get much farther without lowering the magnification to increase the hold values. If you are a dedicated long range shooter, that's not what this scope was made for, it really is purpose designed to help hunters get an accurate hold setup quickly and efficiently.
It does allow you to set it up with preset holds with increments that you choose, and they work on any magnification, so it will work that way if you like.
As mentioned, there is no ballistic calculation in the scope, so it is legal in Colorado and all other states TMK, with the exceptions of Oregon and Idaho.
I can't honestly think of a more efficient system for hunting. There are a few things I would personally like to see that would make the system more flexible for people that might want to use the scope in a traditional way as well (like if you are going to Idaho for example). Most of the things I want would probably increase the price quite a bit, however. We will see, I just got the Sierra 6 in, so curious to test a few things there, but overall, I think for a lot of hunters, it's a very strong solution to consider.
