I put TruGlo ghost rings on both me and my wife's muzzleloaders and our accuracy greatly improved. She is still new to muzzleloading, so she is still shooting shorter distances, but I can get a 2" group at 100 yards with mine. The ring helps your eye focus downrange without all of the peripheral view of the open fiberoptics. I got mine for $35 on Amazon.
I put the TruGlo rings on my CVA Optima V2, and it certainly helps.
The biggest problem I am having is that the rear sight (the peep) doesn't seem to glow much, so it is difficult for me to center the front sight in the peep.
Granted, I'm not as young as I used to be (aHEM...), but I want to know if there is a trick to getting better sight from the rear?
Front sight seems great.
--Dana