I always use a bipod for load development. Lots easier to carry to range than my heavy Hart front rest.
I wonder if strait White Lithium grease would work as lube? I could smear into grooves by hand.
No doubt easier to tote about, but you're a heck of a lot more accomplished with bipod technique than I am (and the large majority of shooters) if you can refine sub-moa loads while using one and make sense of the data. I'd love to see how well you can do with your fine Hart rest.
I have used straight lithium and lithium complex grease in many forms, from NLGI #2 to 6 and off the scale, both commercial and compounded myself. Universally, above about 12-1400 fps in .30-45 caliber, I found accuracy to degrade and barrel deposits to form unless a minimum of 10% wax is present. Similar is true of sodium grease and especially the non-soap thickeners such as bentone, fumed silica, and various forms of carbon (other than carbon which has been specially treated with soap). The wax isn't your problem, it's probably too much of the lube you're using, and if anything, go to a lube which has NO soap in it, such as beeswax/vaseline, Darr's lube, or similar to eliminate soap residue as a problem rather than going the other direction......but......just because I came to these conclusions won't mean you and your rifle will, so try it!
A technique I employed during lube testing occasionally is to patch out after every shot, you may find as I did years ago that using too much LBT lube for your pressure and velocity window can leave heavy, stiff carbon residue in the bore which can be pushed out with a dry patch after every shot, and doing that while experimenting with putting different amounts of lube on the bullet will tell you something.