Long time ago I used bolt gun match rifle for across the course high power.

Lot of running the bolt back and forth.....

Another competitor told me to try a mix of red wheel bearing grease and STP. I settled on a ratio of around 70/30 grease to STP. It would stay effective for a weekend of shooting. YMMV, probably better stuff today?

Was gifted all manner of stuff at shooting matches, couldn't see much difference in the bought stuff and or home made chit.

Now about all I use is leftover motor oil and grease from vehicles and grass cutters. Still have most of a qt of Eezox, rub that on for rust protection sometimes. Works good on Parkerized guns.

Got a box full of old gun slickum products somewhere, I'll see if I can get a pic later....

Have fun Rene!