Being new, there is no need to scrub the barrel as there better not be any residue in it.. Clean it with that 50/50 mixture until you get snow white patches. Then some dry ones pushed through, and finally oil the bore with some good gun oil if you are not going to shoot it right away.

If you are concerned the bore is ruff, take some cotton balls and push them through the barrel. Then you can hold the barrel up to the light and look down through it for cotton fibers stuck all over the side of the bore. If there are, then you need to get some JB Bore Paste and scrub the barrel. Instructions are on the jar.

I do like to have a good solvent around the house. Only for the sake of any plastic or lead build up, but I have noticed these new projectiles produce little to none. Now if you shoot lots of conicals that might be a different story.

Good luck with your rifle. Maybe Underclocked can give you some loads he might have worked up for his. I know he has one of them as well.