To make a clean kill on a deer with open sights and a muzzleloader, I think 150-200 yards is pushing it, but you may be a better shot than I am. I don't shoot at deer with open sights more than 100 yards, but I really hate loosing a deer. Now if you are shooting coyotes, that's different. Loosing one is no big deal. The more you kill the better. You could practice enough to hit fairly consistantly at 400-500 yards if your eyes are good and your hands are steady. But velocity is going to drop and likewise penetration. Good luck finding the right rifle. There are plenty of good options.hi all i am looking into muzzleloading start, I live out in South Dakota and here we can use the 209 primers, but not scopes at all. Here we also have lots of distance to cover with a bullet what do you thnk would be a good gun to be able to shoot 150-200 open sighted or is that just crazy?