use both Montana slings and Butler Creek Mountain Slings, depending on the rifle and intended use.
Mostly this, but I tend to use the 1" Montana sling more. There really isn't that much difference in weight.
When Gander MT was closing, I picked up a couple of slings with their logo on them. They are an almost direct copy of the Butler Creek Mountain sling, but with slightly heavier nylon webbing and they are brown. Got them dirt cheap and they get used a lot too. I tend to just keep the slings on the rifles I use most and when I pick up a rifle just go with whichever sling is on it, so they all get used.
