I have 8 lbs. of the CFE223 and feel that the Copper Fouling Eliminator actually does reduce copper fouling. Enough that it takes me about 1/2 as long to get the barrel on my precision AR totally copper free. Note, when you have a rifle that has shot cloverleafs less than 3/10 inch in total span at 100 yards you do get a bit obsessive about a perfectly clean barrel.
I've also found CFE223 to produce excellent accuracy with a 68 grain Hornady BTHP Match bullet and it meters wonderfully. However with a 60 grain Nosler Ballistic Tip Varmint bullet I have not been able to find any charge between Min and Max that will group under 2 inches at 100 yards. Still don't understand why that is but I tested the full range from minimum to maximum at 2/10 grain intervals with no joy at all.
So, while it's old school and meters miserably enough for me to keep some tweezers next to my scale I'll still keep a good stock of Varget on hand. Because Varget will match or perhaps exceed the accuracy of the CFE223 with that Hornady bullet and with the Nosler bullet 3/8 MOA is routine.
BTW, I still don't understand why I can't get acceptable accuracy with that Nosler bullet using CFE223. In my 20 inch Shilen Barreled precision AR that Nosler loaded with Varget runs 2950 fps with wonderful accuracy. Push that same bullet to 2950 fps with CFE223 and groups come in at a bit over 2 MOA. If anyone can come up with an explanation for that I would love to see it.
The booklets were quite handy in their day. 
