I don't do a barrel break in, and I did not do any modifications to my Pro-hunter. I am getting 1 inch groups at 100 yards with it as is.
The first thing I did was get one of the new Nikon Omega BDC 3X9X40mm a good set of Warne mounts and rings. I then went to the range
and worked up a load that gave me the best overall performance. I ended up with the following load and bullet choice. I am shooting 120 gr. of loose triple 7 and a T/C Bonded Shockwave sabot. I am using Remington Kleenbore primers.
One thing I do to any of my muzzleloader's is, I season the barrels with bore butter. I do put a little on the skirt of the sabot when I am shooting to keep the fouling down in the barrels. When I clean my muzzleloader's, I always run a patch of bore butter down and leave it in the barrel until I shoot again. I have been using bore butter for many many years with great results. I can shoot 10 plus shots without having to clean my barrel and no accuracy issues.
I just ordered a 25 ACP conversion for my Pro-hunter. I am using it in and standard Encore muzzleloader with great results. The reason I want to try it is, I like how big the 25 ACP is and that makes it a lot easier to load and unload the primers. I don't have a crud ring issues with my Pro-hunter and currently my accuracy is great.
That would be the only modification I would make to my Pro-hunter.