I killed my first deer with a muzzleloader by still hunting, it was a flintlock...
I had her primed and ready, loaded with a .45 patched ball and 75grs of FFF Goex...I was moving across a little ridge in a swamp and sighted 7-8 does about 45 yards ahead...I stopped beside a tree, got the hammer back and the trigger set...I picked one out, took a rest on the tree and hit her with a high shoulder shot...She went down, the ball went through the left shoulder blade, through the spin, the right shoulder blade and was found under the hide on the off side...
This was in 1977...The problem is most of today's hunters are a generation removed from using a hammer gun...I grew up using a single barrel shotgun...Just keep the muzzle pointed in a safe directions and don't pull the hammer back until you are ready to shoot and you'll be fine...
On the scopes, I have 3x9x40 Leupolds on both my centerfire and Knight...I seldom turn a scope down below 4X even when hunting in the woods...