I’ve been using bolts for about 10 years after
@WHW turned me on to them. He has been using them since the mid evil ages. Lol.
I’ve used the hand drill and electric drill. You need to have a mark on them to easily identify that they are bottomed out. I’ll put several coats of plasti dip on them, then cut the coating off at the tree line to have a two tone mark. I also paint them grey while they are stuck in the tree.
I find that if you drill them level, the hole cleans out nicely as you drill and the bolt pops right in. If you angle them, a lot of debris stays in the hole and may need a few passes of the drill to clean it.
I never had one fall out. Once you step on it, the threads on the end bites into the upper side of the hole. The closest I had to one falling out, was when I was pulling my back pack up and it snagged on a bolt. Being that they are two toned from the plasti dip on the outside, I could see it was pulled out an inch. I just swung my backpack into it and it popped right back in.