I'm the guy to whom Sabotloader, bless his soul, sold his other Mountaineer back in 2014. It has taken five deer for me since then. It is an awesome gun, with accuracy not far behind a lot of centerfire rifles, even without a scope. The trigger is extremely precise, breaking very cleanly. It is a relatively long and heavy rifle, but that has never been too much of a downside.
Following Sabotloader's recommendation, I fitted the gun with a Williams peep sight. The front bead is a red fiber optic, and we use a six o'clock hold.