If your new CVA "boar" solventis amazing, then it should of left some blue patches - if you shot enough Powerbelt coppers.

For controlling copper, lead and plastic in (1) cleaner/solvent, I like this "2 in 1" below.

http://www.dunns-sportinggoods.com/products/66

For more serious copper issues that arise with some centerfire cartridges, I use this one below.

http://www.midwayusa.com/rewriteaproduct/179403

Lately, all my MLs have been seeing lead conicals. Simple to clean -- just grab the Ballistol for everything ... including short-term storage (3 months).