I bought a big container from Rick at ATR not for the velocity increases (if any since I dont have a chrony) but rather for ease of cleaning.
I started using is on a brand new 22-50 of mine and it cleans up really well. I also started using it on a new to me 7mm RUM that is a real beotch to clean.
I applied about 10 coats of Gunjuice to the RUM but it didnt really help. After talking to Ricks side-kick he said to just clean it really good (which I did), then gunjuice the crap out of it.
I've put about 100 wet patches down the bore over the course of a few weeks. Havent had it out shooting yet but I'm really hoping that will make the fouling minimal.
If all else fails, I'll use a treatment of UltraCoatings Borecoat I just got.
I love shooting, but like everyone else, hate cleaning. (and yes I use wipeout but it doesnt clean the massive copper fouling in the RUM).