I broke my 700 in (.223) with Hornaday moly coated 55 grain Vmax bullets (also did some 50 grain bullets as well), and it was the first time I'd used them. I sorta liked them in most ways, but with one exception. The patches come out black no matter how well the barrel is cleaned. Later I learned that the benchrest guys wipe the barrels with strait Kroil, and that helped. But once those 250 bullets were gone I never really shot anymore thru the barrel. Also found the barrel copper fouled just as fast with or without moly.
Now most folks here know that in my smaller calibers I often neck size, as well as load at the range. I do not use any oil based or liquid lube on my necks at all. I use powdered graphite and lead shot mixture. The necks size a little harder (effort), but think the results are better. Plus there's no problem cleaning the necks afterwards. But when I seat the bullets they tend to pick up some of the graphite as this can be seen in the hole on the targets. Do I get more shots before cleaning? I doubt it, but think the barrels don't foul as bad. Rarely need more than four patches to clean them (took five to six before). If you neck size, I can recommend the powdered graphite
gary