Hunting man,
I used to use a Bushnell 3x9x50 with the quick focus eyepiece on my Encore 50 cal BP but all I got for my trouble was a banged up bridge of the nose. Now don't get me wrong it was not the scopes fault, I sometimes would not hold firmly while shooting therefore the bloody results. I do use the same scope on my 7mm mag and 300 win mag both 700BDL with no blood loss. lol
I can laugh now that i'm healed.
So my solution was to go to the Nikon Omega Muzzleloader scope with 5" of eye relief. I shoot much better now that I don't have to worry about getting smacked.
Now i did read that some of the guys say that the field of view is less because of the eye relief but for me to date it has not been a problem.
daddus1