I just bought a TC Encore Pro Hunter with the 209x50 barrel and can't wait to shoot it. I am planning to get the Nikon Omega BDC 250 scope in camo to match the stock. What I am not sure about are the rings. I like the idea of the DedNutz and Talley one piece rings; what do you guys think of those?

Also, how picky are these guns with bullets and loads? I want to set it up for a 250 gr sabotted bullet with 100 grains (2x50 gr pellets). What kind of group at 100 yards should I expect? If I don't get the group, then I assume I should try different powders and bullets?