That circle is called the Circle-X Reticle. I have it on my Bushnell Dusk To Dawn. Takes a little getting used to it at first.

Your Trophy is on quite a few muzzleloaders. It's the next step-up from the Banner in clarity & low-light gathering. Not alot of eye relief with it, but using 100 grains of powder with a 300 grain bullet should keep your face bloodless... lol