A slight change in plans for the firearm... I cancelled my order for a 7mm-08 (the small mom and pop store wanted me to buy a scratched and dented firearm - no way!!!). While I was at Bass Pro Shops, I was seduced by a brand new Browning Citori 525 Field 12 Ga.. I had to buy it. It is the shotgun that I have wanted for 26 years, since I was 14.
O.K., to the point. I have been trying to remove the factory preservative since Sunday evening. So far, I have used Pyroil Brake Cleaner (no effect), Hoppes (no effect), Break Free and Shooters Choice (better results), and now the bores have been soaking overnight with Kroil inside of it. We'll see what happens.
A call to Browning Product Service gave the recommendation of "...cloth, scrubber brush, and bore cleaner..." My, aren't they helpful? I'll add elbow grease to that one also. One of these days I'll get it to trap range, as soon as I am done pulling brown goo out of both bores!
If the Kroil doesn't work tonight, I am going back to the Breakfree and Shooters Choice. It has given the best results so far.
If anyone else has any more ideas within reason, I am willing to listen to them.