I don't have Bore Snake but my brother does and did and I did a re-clean of a 22 he had used it on. It was very clean.
I don't use a BG on my 22. I have a .17 rod and jag, that works to keep contact down.
I also only clean once ever 500 rounds or so.
I don't use them with my rifles either. At least at my goal of sub 3/8 MOA consistently, I think they are a buck up sales item.
I am not sure they are needed regardless. I have a hard time seeing how a brass jag and soft rod can do anything negative to a steel or stainless bore.