I have Moly'ed my 7mm RemMag hunting load since the mid 80s (Hornady 162 BtSp) I clean my bore after use with kroil and occasionally J&B compound. It has a couple of thousand rounds through the barrel with no apparent loss of accuracy, velocity, or corrosion.
My Load is VERY hot according to modern loading manuals. ( a full 7gr over modern maximum and one grain over the load published on the last 8lb jug of powder I purchased) It was listed as maximum for H-4831 in the manuals from the late 70's and early 80's. When I developed the load I did not have a chronograph. The load shot well, I got 5-7 loading before getting case neck splits and with no outward appearance of pressure problems.
When more modern data started calling for less powder as maximum I decided to try Moly. I have since purchased a chrono and my load, moly coated, is doing 2965 fps. It is flat shooting, accurate, and the bullet hits like the hammer of Thor. I have no intention of changing it until I burn up the 6 lbs or so of powder from the jug I have.
So, your use may differ, but it works for me, and my 700 Remington appears no worse for wear. No moly build up in the bore, no corrosion, and the last time I checked zero it printed a 3/4" 3 shot group, at 200 yds. I am not going to change a thing.