Check out Mike Orlen in Amherst Mass. for choke work. If interested I'll pm you with a price list, much cheaper than Briley and fast turn around.
Now copper is just a wash. I use Nickel Plated from BPI, others have told me NP for m Precision Reloading is better but the BPI i use works fine. I don't load for extended range predator loads as most of my predator shotgun loads go into drillings and can't mbo guns so I have the rifle barrel for longer shots.
I just bought a few bags of wads here in the PM classifieds. I was surprised to see everything I use in the batch. I do load al my own trap, skeet and waterfowl loads as I have a number of 2.5" chambered shotguns and ones old enough to need Bismuth for waterfowl.