wbm, where in NM are you?

My Axis is a .223 heavy barrel and it changes very little in POI with a hot or cold barrel. It shoots tighter groups when the barrel is hot, as in to hot to hold onto. My BVSS is the opposite, groups open up when it gets hot, even with the big fluted barrel. It also did not like to be loaded with copper where the Axis likes a layer of copper in the bore.

If you haven't tried it, get some KG12 copper remover. It works better than any of the other stuff out there with a lot less work. You can actually watch it dissolve the copper in the muzzle area.