I've had a pile of Encore platform rifles, all with the factory barrels. Every one of them shot outstanding. I will admit that did about $35.00 worth of frame changes to each rifle. Very easy rifle frame to work on. I have 200yd targets of 3/4" groups, using 107grs VOLUME of BH209, ignited by CCI209M primers and sending 250gr Barnes TMZ bullets. I like the Encore platform more than any other break open.
However........... I'd suggest you take a real close look at Knight rifles. Some prefer the Ultra-Lite over the Mountaineer but, either of these rifles would be my choice over ANY break open rifle. The bare primer option would be the way I'd go. Knight has come out with a fast twist .45cal, more expensive but, for my type shooting it would be my choice.
Good luck.